Question

Succession occurs because _______.
a.
organisms gradually change the environment
b.
climax communities are not possible
c.
dominant organisms drive out pioneer species
d.
ecosystems never reach a sustainable point


Please select the best answer from the choices provided

A
B
C
D

Answer 1

A

Reason: Succession happens because organisms (especially pioneers) change the environment (soil, light, nutrients, microclimate), making it suitable for later species.