Answer:
D. Chlorophyll
Explanation:
Chlorophyll is important as it allows the plant to convert carbon dioxide and water into glucose.
I would say that active transport is the answer because it's from LOW concentration to HIGH concentrations, so it's going against the concentration gradients.
The asteroid belt is the circumstellar disc in the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets.
Probably the U.S. Environmental Protection Agency also known
as the EPA. They are charged with
protecting people and the environment by enforcing regulations that prevent
pollution. If they find any violation
committed they can impose sanctions and fines as well as imprisonment depending
on the nature of the offense.