What type of organisms would be primarily found in the benthic zone of a lake?

The benthic zone of a lake is characterized by its substrate, which consists of the bottom sediments and the nutrient-rich layer of the water body. This zone supports a variety of organisms that are adapted to life on or near the lakebed. Bottom-dwelling organisms, such as benthic macroinvertebrates, worms, and certain types of algae, thrive in this environment. They play a crucial role in the ecosystem as decomposers, helping to break down organic matter and recycle nutrients back into the water column.

These organisms often have adaptations that enable them to reside in sediments, including the ability to burrow or cling to surfaces. Their presence is vital for the overall health of the aquatic ecosystem, as they contribute to the food web and provide food for other species.

In contrast, planktonic organisms are typically found in the water column and are not associated with the bottom sediments. Fish species inhabit various zones in the lake, but they are not exclusively found in the benthic zone. Aerial insects are typically associated with the surface or above the water rather than the bottom of the lake. Thus, option C accurately reflects the primary inhabitants of the benthic zone.