Question

which species is the first to colonize an ecosystem after a disturbance? native species pioneer species climax species

Explanation:

Pioneer species are the first to colonize a disturbed ecosystem. They are hardy and can grow in harsh conditions, starting the process of ecological succession. Native species are those naturally occurring in an area, not necessarily the first after a disturbance. Climax species are part of the stable, final - stage community of an ecosystem.

Answer:

B. pioneer species