Gravity
Plant roots always grow downward because specialized cells in root caps detect and respond to gravity. This is an example of a tropism. A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism.
The correct answer is option D, Pelagic.
The pelagic zone comprises the water column of the open ocean and can be further differentiated into areas by depth. In deep water, the pelagic zone at certain occasions is known as the open-ocean zone and can be contrasted with water, which is close to the continental shelf of the coast.
Or it can be said, that coastal water not near the bottom is still regarded to be in the pelagic zone. The tunas, sharks, and big marine mammals, like dolphins and whales travel in these waters.
Answer C, biochemical comparisons between different organisms. Because it’s comparing the shark and the fly’s genes and proteins.
