Ecosystem services include processes that increase the quality of the abiotic environment. Which of the following processes would fall under this category?
I) Keystone predators have a marked effect on species diversity.
II) Green plants produce the oxygen we breathe.
III) The presence of land plants builds soil.
IV) The presence of diverse wetlands helps in flood control.
A) only I and III
B) only II and IV
C) only I, II, and IV
D) only II, III, and IV
E) only I, II, and III
Answer: D
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What will be an ideal response?
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