【单选题】An ecosystem is a group ofanimals and plants living in a specific region and interacting with one another and with their physical environment. Ecosystems include physical and chemical components, such...
A.
An ecosystem is a community that includes animals,plants,and microscopic bacteria.
B.
Human activities can do great damage to local ecosystems,so human communities should be cautiously planned.
C.
In managing the ecology of an area,it is important to protect both human interests and the interests of other members of local ecosystems.
D.
People should remember that they are a part of the ecosystems where they live and work.