This question has options. Select from options: Read this fact: "humans building homes in an ecosystem causes that environment to change"

Now answer this question: "What is an example of humans building houses in a ecosystem and causing change in the environment as a result?"

Possible answers: 1). a dog house is placed in a fenced in back yard. 2). a birdbath is placed in a park with a low squirrel population. 3). a city is built over a park and deer lose their home. 4). a small house is built in the forest and animals are fed there.
3).