Depth perception is also known as vision.

According to my knowledge of “swimming on land” is physically impossible, unless it’s a incredibly soft or not dense land there might be a possibility but even if the criteria was met the chance to swim on land are very slim or close to impossible.

I'll do it rn and then answer

The answer which is not a detail carson used to describe the pool in the cave at low tide is b.  hundreds of periwinkles browse the branches and roots of the trees.