The best answer would be "research reasons why species change over long periods of time"
if not i apologize but this is my best guess<span />
Answer:
A. active transport
Explanation:
active transport is the movement of a substance across a membrane against its concentration gradient.
hope it helps you
Answer should be A if multiple choice
Answer:
D
Explanation:
A) Water that falls from the clouds towards the ground, especially as rain or snow.
B) The continuous movement of water on, above and below the surface of the Earth.
C) When plants or animals create offspring.
D) a recurring process where dead plants decomposes and provides nutrients to the soil that are absorbed by plant roots, making more plants grow.
Hope that helped :)