Question

which two of the following benefits are most closely related with reforestation? a decrease of atmospheric carbon dioxide b rebuilding of natural habitats c altering of sunspot cycle d raising of oceanic ph

Explanation:

• Option A: Trees absorb carbon dioxide during photosynthesis. Reforestation (planting more trees) would lead to more carbon dioxide being taken in from the atmosphere, thus decreasing atmospheric carbon dioxide levels.
• Option B: Trees are a crucial part of many natural habitats. Reforestation helps in rebuilding these habitats by providing shelter, food sources, etc., for various organisms.
• Option C: Sunspot cycles are related to the Sun's magnetic activity and are not influenced by reforestation.
• Option D: Oceanic pH is affected by factors like carbon dioxide absorption (but in a different context than just reforestation - ocean acidification is more related to overall carbon dioxide levels and chemical reactions in the ocean, not directly to the act of reforesting in a simple cause - effect way as options A and B).

Answer:

A. decrease of atmospheric carbon dioxide, B. rebuilding of natural habitats