Detailed explanation and options for the selected question.
What is the primary function of mangroves in coastal ecosystems?
A.
Reducing air pollution
B.
Acting as natural barriers against coastal erosion
C.
Increasing freshwater availability
D.
Providing habitat for polar species
Explanation:
Mangroves act as natural barriers, protecting coastlines from erosion and storm surges. They do not increase freshwater availability or support polar species.