Im not really sure , but it might have something to do with polar chemical compound <span />
An absorption line will appear in a spectrum if an absorbing material is placed between a source and the observer.
Answer:
it's a
Explanation:
Earth rotates on its axis once each day, and the gravity of the Moon causes the oceans to bulge. Earth rotates on its axis once each year, and the gravity of the Moon causes the oceans to bulge.
New species often form on new islands because they evolve to fill new niches
