Answer:
Because if his basic needs are not fulfilled he can't focus on learning and he does not have the motivation to do so.
Step-by-step explanation:
Maslow's Hierarchy of Needs states that in order for an individual to succeed, he/she has to have their needs satisfied.
This is best represented by his Pyramid of Needs; in order for an individual to pass to the next stage, he/she has to have the basic needs fulfilled.
In this case, since the child comes to school hungry and without a coat, it can be deduced that his physiological needs (water, food, clothing) are not met, thus he cannot go on to the next stages in order to pass the grade.