The answer would be D. All of the above because A, B and C are also true.
I believe the answer is D, as we can reproduce and we have to be the same biological species to do that
<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>
From the energy of photons(light).
Photons give their energy to electrons and through the processes of the light reactions and electron is added to NADP+ to become NADPH.
It seems to have choices. The exposure mutagens may lead to the mutation. When the mutation add up to a certain amount and can lead to cancer. So exposure mutagens will increase the cancer risk.
