Question

question 3 of 10
which two environmental changes would be likely to make an ecosystem less stable?
a. a predator population increases one year and then decreases the next year.
b. a beaver dam temporarily reroutes a river.
c. an invasive species of plant is introduced to the area.
d. a keystone species is removed from the area.

Explanation:

Invasive species can out - compete native species, disrupting food webs. Keystone species have a large impact on ecosystem structure; their removal can cause major changes and instability.

Answer:

C. An invasive species of plant is introduced to the area, D. A keystone species is removed from the area