I'm trying to make a logo. For that draw a picture (truly it's a word drawn with watercolours), took a photo, traced it in illustrator, and it looks the way I want. The only problem I don't know how to get rid of a background (the white background of a paper that it was originally drawn). I don't have Ps at the moment. How can I do it in Ai? Please, please help!
Quite frankly, you'd be much better off posting this question in the Illustrator forum, but here goes.
Whatever image you pasted or imported into Illustrator will show up as an object in the layers palette. Go to the layers palette, find the image and delete it by dragging it to the trash. Voila, problem solved! I do things like this all the time!
Your question has nothing to do with typography. Please post in the Illustrator forum.