I saw him when he was child .(Determiner) ​

I saw him when he was a child.

Explanation:

The answer is "a" child.

wait what do you mean

it creates a visual picture of the man.

it conveys what the scene sounds like.

it describes the actions of the boy.

it reveals the poet’s opinion of the characters.

it encourages readers to care for the characters.

greet them:

buenas noches.

that is considered night time which is when "good night" is used.