Question

why do you have to make you answers so long you can just give the answer in like on sentence

Answer 1

We should give the answer long because we should explain it. Some people do not understand the answer in only one sentence so we explain to them and they can learn and solve other problems by their own :)))
i hope this is helpful
have a nice day 

Answer 2

one* and so the person who asked the question won't have to ask the same type of question again