Answer:
D) Learning about sonic booms can help you appreciate just how rapidly sound can travel.
Explanation:
To understand sound, waves, empty space, air and their connections, first you have to get the meaning of molecules, as they are the base of everything else mentioned.
In literary terms, it's most like a decision. If this is referring to conclusions in science, however, it is closer to a prediction.
Answer:
Compound
Explanation:
Both clause re independant, meaning they can stand on their own.