2. A helps the population growth. So it's incorrect. B it might be correct. C might be correct. D helps the population, so incorrect. Out of B and C, B harms the most, so B is correct
3. A no because thats getting water were there is no water. B not related to anything at all. C no again. D, is our last choose and its correct. Migration because thats starts colonies, cities, villages, etc.
