What characterizes a forest?

A forest is characterized by a large area that is predominantly covered with many trees. This definition emphasizes the abundance and diversity of tree species, which create distinct ecosystems. Forests provide habitat for numerous wildlife species, contribute to oxygen production, and play vital roles in carbon storage and climate regulation.

The presence of various tree species in a forest leads to complex understories and ecosystems, including shrubs, herbaceous plants, and a rich diversity of animals. This complexity distinguishes forests from areas that might contain just a few trees or be dominated by other types of vegetation, such as grasslands or deserts. Thus, option C captures the essence of what constitutes a forest in terms of structure, biodiversity, and ecological importance.