Idon't fully understand what a nebula is. can anyone explain it?

How does the bare soil surface type affect the amount of runoff

Which are evidence of the seafloor spreading? a. molten material b. magnetic stripes c. continental material d. drilled core samples e. ocean water samples

Prompt what is cultural ecology? explain the concept of environmental determinism, and give an example to support this theory. explain the concept of possibilism, and give an example to support this theory.