how do i awser someones question?

Answer 1

I suppose you have in mind YA questions.
Select the topic in which you have some good knowledge, and go through the questions in that topic. Where you feel you could answer a question, do some research, if necessary, to improve the quality of your answer.
Draft your answer as clearly as you would like your questions to be answered, if you were to ask questions instead of answering them. Do a spellcheck of your answer before you submit it.
Do not go through the previous answers to the selected question as this might prejudice your answer. After you submit your answer, you can check what others have written. Many times, even with say 8 or 9 previous answers, your answer could be better in content or quality or expression.
Learn more about the topic by referring to appropriate material that is reliable, before you attempt an answer. Points in YA do not mean anything important, as there are no prizes. Concentrate on the quality and content of your answers.