Which aquatic feature is indicated by high turbidity?

High turbidity in aquatic environments is indicated by the presence of suspended particles in the water, which can include sediment, organic matter, and microorganisms. This condition leads to cloudy or murky water, making option "C" the correct answer.

When turbidity levels rise, visibility decreases, and sunlight penetration is reduced. As a result, aquatic plants and organisms may struggle to photosynthesize effectively, impacting the ecosystem's health. While excessive algae can contribute to turbidity, they are not the only factor; other suspended materials also play significant roles. Clear water, which signifies low turbidity, is marked by minimal suspended particles and higher visibility; therefore, it does not relate to high turbidity. Similarly, minimal plant life could result from high turbidity but is not directly indicated by turbidity levels themselves. Thus, the correct connection to high turbidity is indeed the characterization of the water as cloudy or murky.