Biology : PU-CET (U.G) 2016 Panjab University Entrance Exam With Answers

The answer is A: Freshwater Marsh.

Freshwater marshes are one of the most productive ecosystems on the planet and support a diverse array of plant and animal life. They are home to a variety of species including amphibians, reptiles, birds, mammals, and fish. The abundant plant life in freshwater marshes also provides habitat and food for a wide range of invertebrates and other organisms. The high level of productivity and diversity in freshwater marshes is due to the nutrient-rich sediment and shallow water that supports a complex food web.