Answer:
Inner planets: Mercury, Venus, Earth, Mars
Outer planets: Jupiter, Saturn, Uranus, Neptune
Explanation:
Inner planets are planets who have an orbit that is within the asteroid belt, they are closer to the sun. Theses include Mercury, Venus, Earth, and Mars. Outer planets are planets are the gas giants, they are called gas giants because they are mainly made up of gas and liquid. These include Jupiter, Saturn, Uranus, and Neptune.
D. fingernails
Skin, hair, and vertebrae are all the outer layer of the body and protect the body. The fingernails aren't part of that.
The process of water blowing across the cell membrane from areas of higher concentration to areas of lower concentration what is the flow of water called Diffusion.
I think A makes the most sense..