Letter D would be likely it
Answer:
Different things make different vibrations when they hit, and that's why you hear high notes and low notes. Things that vibrate quickly make small waves in the air, and that sounds to you like a high-pitched note. Things that vibrate slowly make longer waves in the air, that sound to you like a low-pitched note.
Answer:
I think that it is closest to the sun.
Explanation:
it is the second closest planet to the sun.
Crucial to all life is the answer
