Which of these is most likely harmful to an ecosystem?
Building new homes in a wetland Taking away airplanes from an airport Planting trees in an orchard Adding floors to an office building
Question: Which of these is most likely harmful to an ecosystem?
A. Building new homes in a wetland
B. Taking away airplanes from an airport
C. Planting trees in an orchard
D. Adding floors to an office building
Answer: