In an ecosystem, there are many factors that affect how many organisms can survive there. which of the following is one of those factors?
a.
availability of water
b.
color of flowering plants
c.
age of mammal species
d.
number of times humans have seen the area

availability of water

Explanation:

There are many factors—both biotic (living) and abiotic (nonliving)—that affect how many organisms can be supported in an ecosystem. These factors include light and water availability, as well as the soil, plants and animals in the ecosystem.

according to study island

is this for the e2020 class

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!