In an ideal situation, the producers include the trees, grasses and forests. Building of roads and parking lots involve the clearing of forests and bushes. Therefore there would be a decrease in number of producers. And ur answer is A.
Answer: [A]: "a decrease in the number of producers" . _________________________________________________ Note: The "consumers" tend to be more mobile (at all levels) compared to the the "producers"—which are less "mobile"— (plants, grass, trees, moss, other autotrophs); as such, the "producers" will have the greatest tendency to decrease to due destruction (as the most immediate effect—considering the answer choices given). _________________________________________________