Answer:
He should ask the teacher to explain it to him.
Step-by-step explanation:
When a student does not understand what a teacher explained, he must ask the teacher to explain again. No student should be ashamed to ask teachers for help.
The school environment is the ideal place to answer questions and learn, for this reason teachers will always help students who did not understand something, explaining it again until everyone does. Still, many students feel ashamed or afraid when asking teachers questions and end up going home without learning all the content. When this becomes routine, it can even compromise student learning.