Question

Trees help us to live (supply question tag)

Answer 1

Answer:-
Trees help us to live, don't they?

Answer 2

Answer :

Question Tags refer to short questions that are put at the end of sentences. Question tags are mostly used in spoken English.

For example, in the sentence "You're Mr. Sharma. Aren't you ?', The question tag 'aren't you ?' turns the sentence into a question.

In the given sentence 'Trees help us to live.' the question tag 'Don't they ?' turns the given statement into a sentence.