Three ways a scientist can reduce bias include: 1) Sampling a larger pool (assuming the subjects are human) in order to broaden recorded data. 2) Making sure to sample more than one group. This means to not just sample one's friends, etc.
the answer you're looking for is OVERPOPULATION. Overpopulation is when the carrying capacity of the land is exceeded. I hope this answer helps u out on your test and have a great day.
