Question

How do answer in full sentences​

Answer 1

Complete sentences must have at least one subject and predicate, the necessary pieces of an independent clause. A subject is the first unit of information and contains a noun; the predicate expands upon that information and contains a verb or phrase.

Answer 2

so instead of writing one word, you need to write a full sentence.

for example:

What colour is john's hat?

instead of just writing: Green

you would write: John's hat is green