Answer:
1. "a, O, and J"
2. "R and C"
3. I'm not entirely sure about #3, but I believe the answer is "d and R"
4."J, K, I, M, N"
5. "d"
6. "I" explain why: "It is at the bottom, so it is therefore the oldest."
7. "Q" explain why: "It is at the top, so it is therefore the youngest."
8. The folding occured before the faulting. Why? Because the folding is evident in the second half of the fault.
<u><em>DISCLAIMER: any of these answers could be wrong. I did my best but I am still human.</em></u>
Answer: Sea stars move using a water vascular system. Water comes into the system via the madreporite. It is then circulated from the stone canal to the ring canal and into the radial canals.
Explanation: The radial canals carry water to the ampullae and provide suction to the tube feet.
"Energy transmitted as sound waves" is the correct answer. If you have trouble remember, just think of an acoustic guitar, which sends this energy out every time a string is plucked.
