For the first one, you would explain how the number of pheasants per square kilometer grew in between year one and ten. same thing for year 10-18.
for the second one, you would say some possible reasons why the population changed so much.
for the 3rd one, you would, again, say in your own opinion, what might happen to the pheasant population as a result of the predators, or coyotes, entering the area.
Hope it helped
