UPSC Prelims GS - 2022

Question 43
EASYCorrect: +2Incorrect: -2

"If rainforests and tropical forests are the lungs of the Earth, then surely wetlands function as its kidneys." Which one of the following functions of wetlands best reflects the above statement?

    a
    The water cycle in wetlands involves surface runoff, subsoil percolation and evaporation.
    b
    Algae form the nutrient base upon which fish, crustaceans, molluscs, birds, reptiles and mammals thrive
    c
    Wetlands play a vital role in maintaining sedimentation balance and soil stabilization.
    d
    Aquatic plants absorb heavy metals and excess nutrients.