Answer:
Darwin's theory
Explanation:
competition among individuals for available food sources is the most likely cause of the observed variation
Answer:
weathering has to change the soil not transport it
Explanation:
<span>Location of the estuary, the amount & quality of fresh water flowing in and oceanic storms that have the tendency to push in more salt water are all huge causes of the amount of salt in the water of an estuary to change. </span>