Read this paragraph.

The overpopulation of deer in our area has been made worse by the building of a housing development on the outskirts of town. Once the forest was partially cleared for the development, the deer moved in, as their preferred habitat is a mix of open meadow and forest. Deer overpopulation has resulted in several problems in our neighborhood. People have hit deer with their cars, resulting in injuries and property damage. Deer are feeding in flower and vegetable gardens, and deer droppings are messy and potentially harmful.

Which best states the author's purpose in writing the paragraph?

to present the problem of deer overpopulation and offer a solution
to show the effects of deer overpopulation and what led to it
to warn people not to build houses in forested areas
to make people aware of the positive effects of deer overpopulation