D because the closer they are geneticaly, the more related they are. A cactus and a squirl have little to no similer genetic makeup so A human and a gibbon that already have a conspericy around them as to evolution would have closer makup.
Answer:
Explanation:
for the activation of enzymes to break down protein
CO2 traps heat in the atmosphere of the earth which leads to global warming because of the green house effect
Preserving them will ensure that poachers will not hunt them and their habitat will not be destructed