I have two questions

1. What influences what we know about ancient art?

2. How is our knowledge of ancient art similar to or different from our knowledge of prehistoric art?

First, fix the grammar

second: The influences about ancient art would be, the animals they looked up to, or the pyramids they built. These influences were caused by many things including people and animals.

2. The difference is Prehistoric art wasn't based around one figure or the mind. It was mostly based around Pads (stones) to understand what was mostly going unlike, Egyptians had hyroglipcs. The Prehistoric age had things to makeup what was going on in life, the Egyptians did it through who they looked up to.