Does anyone know of a way to put an image in the background of a subject that is already generated by SD?

So I was learning to make logos and I saw a couple of youtube videos that did it. I was able to make art that is basically on a white background or grey. Kinda like this

https://imgur.com/rIko8II

Question now is, is it possible to put a background behind this subject? I guess two options

Option a) to have me supply an image and put it in the background or

Option b) to have another prompt to put the image in the background?

Thanks appreciate your help!