Question

tropical rainforests have two layers: the emergent layer, canopy, and forest floor. the emergent layer is the highest. this is where the tallest trees are found. the canopy is where leafy treetops meet to form what looks like a continuous layer. up to 150 feet above the ground, this layer keeps the tropical sun from reaching lower layers. it is home to monkeys, birds, flying squirrels and many more animal species. the forest floor is shaded by the canopy and consists of smaller trees, bushes, flowers and other plants. animals like snakes, frogs and many species of insects can be found there. the forest floor is the bottom layer. this layer is mostly bare. due to a lack of sunlight and poor soil, this layer does not support plant life. it is home to fungi, bacteria and animals like chimpanzees, gorillas, deer and leopards.
based on the passage, which of the following best describes the relationship between the canopy and forest floor?
choose one option
a because the canopy blocks rain, the forest floor never gets wet.
b because the canopy blocks sunlight, the forest floor does not support plant life.
c because the canopy can reach 150 feet above the ground, it has no effect on the forest floor.
d because the canopy is home to monkeys, there are no chimpanzees on the forest floor.

Explanation:

• Option A: The passage says the canopy blocks "visions of smaller rivers, lakes, flowers and other plants" and mentions rain? No, it doesn't say the forest floor never gets wet. Eliminate A.
• Option B: The passage states "The forest floor is the bottom layer. There is a lack of sunlight and poor soil, this layer does not support plant life." And the canopy is above, blocking sunlight. This matches.
• Option C: The canopy being 150 feet above doesn't mean it has no effect. The forest floor's conditions are affected by the canopy (sunlight blockage). Eliminate C.
• Option D: The passage says the forest floor is home to chimpanzees, so this is wrong. Eliminate D.

Answer:

B. Because the canopy blocks sunlight, the forest floor does not support plant life.