Transition zone of varied natural vegetation occupying the boundary be

Transition zone of varied natural vegetation occupying the boundary between two adjacent and differing plant communities is known as

ecological succession
ecotone
ecological niche
climax
This question was previously asked in
UPSC CAPF – 2020
The correct option is B.
An ecotone is a transition area between two biological communities. It is the zone where two communities meet and integrate, and it often contains a diversity of species characteristic of both communities, as well as some species that are unique to the transition zone itself.
Ecological succession is the process of change in the species structure of an ecological community over time. An ecological niche describes the role and position a species has in its environment. Climax community is the stable, mature stage of ecological succession. The description provided in the question accurately defines an ecotone.