Answer:
The boy at the back of the class.
Step-by-step explanation:
A young student, Alexa who is nine-years-old lives with her mom, a librarian in a flat in London, England. Alexa lost her father three years earlier in a car crash and now worries the memory of her beloved father is slipping away.
On the third Tuesday, after school has started again, a new student arrives in Alexa's class. Although her teacher, Mrs. Khan introduces the boy as Ahmet, she doesn't tell the class anything about him. Alexa notes that Ahmet, quiet and shy, has eyes like those of a lion, and she notices his tattered red backpack.
Almost immediately, Alexa, who has three best friends, Tom, Josie and Michael, decides to befriend Ahmet, but there are few opportunities to actually talk to him as he's not out for recess and he isn't around at lunch.
After school rumors abound, with Alexa's classmate, Jennie stating that Ahmet was likely dangerous and couldn't come out during the break. But when he reappears at the end of the day, Alexa can't resist running over to Ahmet and offering him a candy she's been saving for him.
Rumors continue to swirl; he has a contagious disease, and his family is super-rich and has sent him to the school for protection. But it is from two parents gossiping that Alexa overhears that Ahmet is a "refugee kid". That night she tells her mother what she's overheard and wants to know what being a refugee kid means. Alexa's mother explains that refugees are people who are forced to flee from their homes, often leaving everything they own and even the people they love, behind.
The next day in school Ahmet has Ms. Hemsi to help him. After school, Alexa and their friends approach Ahmet with treats. They learn from Ms. Hemsi that Ahmet is from Syria and speaks Kurdish. Alexa is thrilled when she sees Ahmet taking a bite from the apple she's given him. But she's also very worried because Brendan-the-bully has been watching Ahmet. And the very next day, Brendan does bully Alexa and her friends as they play football with Ahmet. Fortunately, Ms. Khan comes to their rescue.
Ahmet experiences more bullying at school and gets into a fight with Brendan when Alexa attempts to give him a pomegranate at lunch hour. In an attempt to help his classmates understand what he's been through, Ahmet gives a little presentation before the half-term holiday. He tells the class that he is a refugee from Syria, whose family fled because of war. Ahmet reveals that his family traveled over mountains and rivers, carrying their cat, suitcases, and his little sister. However, in a drawing of the boat they used to cross a big sea, the cat and his sister are missing. Ahmet's drawing of their life in Greece, living in a tent with people from Afghanistan, Pakistan, and Eritrea shows only himself and his father. Alexa figures his mother is sleeping in one of the tents. His journey continued to France and finally to England.
After hearing Ahmet's story and seeing the pictures he drew, Alexa has many questions. She wonders where his sister and mother are and what happened to his cat. When Alexa brings Ahmet one of her Tintin books to read, she discovers they have a similar love for the character. This prompts Ahmet to share that he doesn't know where his dad is, that he might be in France and that his sister Syrah is "in the sea" and that his mum is sick somewhere. This information deeply upsets Alexa and she's unable to sleep that night.
However, that changes when Alexa overhears a man and woman talking on the bus on her way to school the next morning. The man indicates that the government is planning to close the border by the end of the month. Alexa is upset because she believes that this means unless Ahmet can find his mother and father before the border closes, he will never see them again. At school she tells her friends what she overheard, breaking her promise to Ahmet to keep the details of his family a secret. They decide to tell their teachers, Mrs.Khan and Ms. Hemsi. Although their teachers attempt to reassure them that everything is being done to help Ahmet, Alexa and her friends remain unconvinced. Together they begin to brainstorm ideas and form plans. Then Alexa has the "Greatest Idea In the World", a plan that involves skipping school, taking the train, and the Queen! The boy's Tom and Alexa interrupt the centuries-old Guard changing ceremony. This way they get the message to the queen and locate Ahmet's family.