Question

question 10
a community may undergo a regime shift or a phase shift if
○ pollutants cause a rapid rise in mutations
○ it has too many symbiotic relationships among species
○ it suffers a natural fire or flood
○ all invasive species are removed
○ it loses a keystone species or suffers a major climatic change

Explanation:

A regime shift or phase shift in a community occurs when there are major disruptions. Losing a keystone species can have a cascading effect on the entire community structure and function. Major climatic changes also significantly impact the environmental conditions that species depend on, leading to shifts in the community. Pollutants causing mutations may not always directly lead to a regime - shift, too many symbiotic relationships are normal in healthy communities, natural fires or floods can be part of normal ecological succession and may not always cause a regime - shift, and removing invasive species usually restores rather than causes a regime - shift.

Answer:

it loses a keystone species or suffers a major climatic change