The main idea is basically "what is the passage saying?" If you read you will realize that it's informational passage of effects of removing forest canopy and soil erosion. The correct answer would, therefore, be D.
Us because if you say we in that sentence it just doesn't make sense
Answer:
Short A
Explanation:
Short a is "ah" and trait is long a, therefore making it the answer.
(You probably wont give brainliest but I would appreciate it)