Answer:
Define the problem - a question you'd ask yourself about something you'd like to know
Step-by-step explanation:
In other words, for example, 'Why does my dog bark at vehicles with flashing lights?' If a paragraph format is needed, you just need to elaborate by adding to that further to make a full paragraph which teachers usually want minimum 5 sentences.
Why does my dog bark at vehicles with flashing lights? A truck will go in reverse and lights flash, and my dog barks. A vehicle can be turned in any direction and my dog barks. She goes crazy and her back fur stands up.
(Maybe not a great example, but that's what defining the problem means.)