The correct answer for this question would be C) At seafloor spreading centers or the third option.
It makes a weird kind of medicine that makes you more healthy, and it eats away rotting wood .etc.
Active transport refers to a substance moving from areas in which it has low concentration to an area with high concentration, one example i guess is endocytosis, "<span>the taking in of matter by a living cell by invagination of its membrane to form a vacuole"</span>
