What is the role of the beaver in its ecosystems? a) it is a foundation species and the main source of food for the natural predators of its ecosystems.
b) it is a keystone species that modifies its natural environment by damming streams to form wetlands
c) it is a dominant species, as it has the greatest number of individuals among all the mammalian species of its ecosystem
d) it is an endangered species as it has the least number of individuals among all the mammalian species of its ecosystem

i believe the answer is c

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.