No grooming your snail while driving. Just ask Spongebob. Oh by the way, what are the options?
Answer:
If and then for example: If you get at least 6 hours of sleep, you will do better on tests than if you get less sleep.
Explanation:
The answer to your problem is I believe (B.)
You can picture a sound wave a lot like a Slinky wave . . . a
thicker, compressed blob moving along the path, with thinner,
stretched-out places before and after it.
The thicker parts of a sound wave, where the air is more dense,
are called compressions.
The thinner parts of a sound wave, where the air is less dense,
are called rarefactions.
