Building new homes in a wetland Taking away airplanes from an airport Planting trees in an orchard Adding floors to an office building
I gave my students this multiple choice question: Which of these is most likely harmful to an ecosystem?

Only one answer is correct among these 4 choices:
- Building new homes in a wetland
- Taking away airplanes from an airport
- Planting trees in an orchard
- Adding floors to an office building

Could you tell me which one is correct?

Building new homes in a wetland