The latter. I'm not capable of making living objects, or food, and so things like herbs and seeds fall into those categories. I can make things that could recreate soil conditions, if we have existing soil.

[She elaborates, though not by much.]

It does. It's similar to exercising for me, so I can't use it limitlessly. However, te amount of objects I can make also varies. If I'm extremely familiar with them, I can make them easily without breaking a sweat. Larger objects take more time and energy, too.