When grey wolves were wiped out in the 1930s by hunters in the Yellowstone National Park in America, the population size of the elks, which were the prey of the wolves, increased. As a result, the land was overgrazed Grey wolves were reintroduced into the Yellowstone National Park in the 1995. When the wolves were reintroduced, what happened to the population size of
a)the elks
b)the plants that the elks fed on explain answer?​