Which of the following does not explain the importance of mangrove forests?
a. they provide shelter to organisms on high energy coasts.
b. they prevent erosion along coasts.
c. they increase surface runoff and flooding.
d. they filter and process pollutants out of the environment.

The correct option is C.

Mangrove forest serves as habitat for a large number of water animals such as molluscs, crabs, fish, etc. Mangrove helps in stabilizing coast line, it protect the ecosystem from storms, it stores high amount of carbon and many animals lived in various habitat in the ecosystem. Mangrove forest does not increase surface run off and flooding rather it prevent it.