The new population that experienced natural selection is now better fit or more adapted to the environment than the old population
A: Glyclosis
This is just a guess as I need to answer at least one question
Answer: It's not blocked
https://www.khanacademy.org/science/high-school-biology/hs-human-body-systems/hs-body-structure-and-homeostasis/a/tissues-organs-organ-systems
<span>Desertification is the cancer of the earth,” Argentine geographer Elena Abraham told IPS. “It is a process of degradation that does not manifest itself in spectacular ways but furtively advances, and by the time it is visible there is nothing to be done, and people have to move away, in search of an alternative.”</span>
I believe the answer is (B)
<span>a complex series of feeding relationships with many organisms interacting and depending on each other </span>
