Question

What does Mr Adam do? He . . A) drive a bus B) writes books C) teaches children

Answer 1

Возможно, это вопрос к какому-то тексту, где конкретно указано, чем занимается Mr Adam. Если говорить о грамматике, то ответ может звучать так.
He drives a bus
He writes books
He teachers children
Но скорее всего ответ "прячется" в тексте, к которому задан этот вопрос

Answer 2

He drive a bus.
He writes books.
He teaches children.

Answer 3

It is a command or a request to give a thorough explanation or description of something.

The question "What does Mr Adam do?" is asking about the occupation or activity of a person named Mr Adam. It is a common way to start a conversation or to get to know someone better.

The sentence "He . . ." is incomplete and needs to be filled with a verb and an object or a complement. For example, "He drives a bus", "He writes books", or "He teaches children".

The options A), B), and C) are possible ways to complete the sentence, depending on what Mr Adam actually does. They are all grammatically correct and use the present simple tense to describe a habitual or regular action. However, only one of them is likely to be the correct answer, based on the context or the source of the question.