Photosynthetic organisms, such as plants and algae, depend on the availability of two important inorganic nutrients, and

many of the animals facing extinction are very important. most of the extinctions are caused by human hunt and pollution. these are not obligatory and must be stopped, because the life in the wilderness is one to be admired, not one to be destroyed. the sinners have to stop.

the answer is a. overall rising sea levels

briefly, the reason this is so is because the global temperature rises and melts glaciers which raises sea levels. i think, anyway.

a.the state of maintaining a stable internal environment despite external changes

c because the sponge will take up the water through absorption which is how plants pull water up