I think its salinity because the other things have something to do with tracking precipitation
the answer you are looking for is option d
<span>Charles Darwin theory is theory of biological </span>evolution, that explains how modern organisms evolved over long periods of time through descent from common ancestors. Evolution is the process of change over time and Darwin explains in his theory the changes in humans over time and <span>shows how the living world is constantly changing.</span> This is the reason why cientists refer to charles darwin’s ideas about evolution as the theory of evolution.
Answer:
I believe the answer is B.
Explanation:
Hope my answer has helped you and if not i am sorry.
