According to the ecological systems model, niche refers to the:​

A) ​domain in which people in a community work.
B) ​statuses or roles occupied by community members.
C) ​boundaries that prevent inputs into a community.
D) ​unique population characteristics of a community.

Niche

A specialized segment of the market for a particular kind of product or service, often catering to a specific or unique demand.

Ecological Systems Model

This model explains how the complex interactions between a person and their various environmental systems impact their development.