Question

Which of these is a disturbance that would trigger primary succession?(1 point)
Responses

glacial retreat
glacial retreat

road construction
road construction

livestock grazing
livestock grazing

wildfire

Answer 1

Primary succession is the process that occurs in an environment that is devoid of soil and life, such as after a volcanic eruption or glacial retreat. Among the options provided, **glacial retreat** is the disturbance that would trigger primary succession, as it exposes bare rock and allows for the gradual development of soil and ecosystems over time.

So, the correct response is: **glacial retreat**.