Population size and density are the two most important statistics scientists use to describe and understand populations. A population's size refers to the number of individuals (N) it comprises. Its density is the number of individuals within a given area or volume. These data allow scientists to model the fluctuations of a population over time.
The second and the third option are completely the same.
So either of them would be correct - Pelecinus polyturator.
A) Algae.
(im not 100% sure but it makes the most sense to me. See if google knows to double check)
Answer:
photosynthesis is the process of making food in the presence of sunlight and water