I think its the last one...not sure. ;)
Hope this helps :D
Answer:
Option 2
Explanation:
I have answered a question like this before and got it right. lol.
Answer is B. Hope this helps!
Earth is approximately spherical in shape like all planets and stars. Earth is composed mostly of rock. Three-fourths of its surface is covered by a relatively thin layer of water (some of it frozen), and the entire planet is surrounded by a relatively thin blanket of air.
