The answer is from a plant or an animal. Hope this helps.
Active transport requires the help of carrier proteins, or “pumps”. ... Active transport is key to the function of a cell. It helps the cell control how much of certain ions such as water, sodium, or potassium pass through the cell membrane. Without active transport, a cell would not be able to maintain homeostasis.
C. Desert
A. The tilt of the Earth's axis as it circles the Sun.
Sunlight, then plants intake it and it goes through a process of photosynthesis.