Which succession occurs in a community that was never colonized before?

Primary succession.

Explanation:

Succession may be defined as the the phenomena of the change of the species structure with respect to time. Two types of succession are primary succession and secondary succession.

Primary succession may be defined as the succession that occurs at the barren lands. The community has never colonized in case of the primary succession. The pioneer species in primary succession is lichens.

Thus, the answer is primary succession.

Primary succession I think