Which of the following statements is true about submersed aquatic plants?

Submersed aquatic plants exhibit a wide range of structural characteristics, which can include variations in stem thickness, leaf shape, and reproductive structures. This diversity allows them to adapt to different environmental conditions, such as varying light availability, water flow, and nutrient levels. Some species may have flexible stems to withstand currents, while others may have specialized leaf structures to optimize photosynthesis under water.

The other statements do not accurately represent the nature of submersed aquatic plants. For instance, while some plants may rely on surface water for light, many submersed species can thrive independently of surface conditions. Additionally, although some submersed plants can detach from their substrate, many are anchored to the bottom, contributing to the stability of the aquatic ecosystem. Furthermore, submersed plants are not exclusive to fast-moving water; they can be found in a variety of aquatic environments, including slow-moving rivers, lakes, and ponds.