Problem: Molly and Brian are two friends who moved away from one another after becoming close in college. They still talk on the phone regularly and see each other a couple times a year. During a recent conversation, the subject of population comes up. Molly's town is currently increasing a steady decrease in population, and Brian's town has been seeing an increase in population. An Allee effect is currently happening in which town?

A: Molly's town

Problem: Two coastal Canadian towns, Hammond and Soundville decided to start sand mining to bring more money to their budgets. A few months later however, Hammond decided to stop all mining operations and find other sources of income. they wanted to protect the environment. Which village made more money from sand mining?

A: Soundville

Problem: John wanted to know what makes a lake different from a pond. To that end, he first visited a lake. He labeled that part of the study as case A. Then he visited a pond. He labeled that part of the study as case B. John realized that though both of them were water-bodies, they were very different. Which water-body would most likely not be fed by a river, case A or case B?

A: case B

Problem: Reed started studying protozoa and was more interested in the predatorial behaviors of protozoa, while Brad wanted to know more about other types of protozoa, suck as grazers and decomposers. Which person learned more about protozoa preying upon single-celled organisms?

A:
Reed