Which of the Following Roles Played by the Massive Rain

Multiple Choice

Which of the following roles played by the massive rain forests of Earth is perhaps the most important in the maintenance of the entire world's living environment?

A) Absorption of H₂O as rain and the production of vital timber for fuel and other uses
B) Absorption of sunlight and the prevention of its reflection back into space,preventing massive worldwide cooling
C) Support of a vast variety of wildlife,which is essential for the maintenance of an adequate gene pool for mammals and insects on Earth
D) Absorption of CO₂ and production of O₂,renewing our atmosphere and reducing the greenhouse effect