Ihave to write a coherent paragraph with certain paragraph writing steps with supporting sentences, etc. the paragraph can be about anything i want, although the topic must be narrow enough for only one paragraph and not a whole essay. any topic ideas anyone?

Photosynthesis. because this topic is simple, yet explanatory. And easy to follow.

Ok there are a lot of choices to pick from, but you have to keep narrowing down to the point the idea is small enough for a paragraph. 

do you want it to be Fiction or Non-fiction?
If fiction, is it a made up story or a something that happened to you?

If non-fiction, write information about someone, either celebrity or historical people. 

Keep narrowing your ideas down. ( example: celebrity- Beyonce- her clothes- one type of outfit she wears-  The outfit she wore in her concert.) 

Hope this helps!