Answer is A. Because natural selection the iguanas that can swim better would survive more and reproduce more. Webbed feet and flat tail would help with swimming.
I think the answer might be giant otter , but not sure
A pair of centrioles make up one centrosome, which a centrosome is considered an organelle. Depending on your course definition of sub-organelle, centrioles may be considered so, however, centrioles are generally regarded as individual organelles.
At first, the population of predators would spike and increase quickly, but then over time, gradually decrease.
(This is because at first there's more food, so the predators population increases. But overtime it begins to level out and the predators' population catches up with the prey, and in result, doesn't continue increasing.)