I'm not 100% sure, but I'd say the availability of vaccines and medicine.
Answer:
D
Explanation:
we all need that all of then helps to increase erosion rates
primary division of the sea, which includes the whole mass of water subdivided into neritic and oceanic zones; also pertaining to the open sea (open water)
<span>The light of color, and the type of plant would be controlled variables. The growth rate would be the dependent variable, and the independent variable would be the amount of light.</span>
