Answer:
The functional role of the organism in its habitat represents the its niche. it includes fundamental and realized niche.
Explanation:
The sum total of lifestyle pattern, consumption of resources from the habitat and adaptations present in the organisms to make it suitable for the system make the niche of the organisms.
Hence, the niche of an organism describes the functional role of the organism in its habitat. It describes how an organism interacts with organisms present in the same habitat and how does it derives material from the environment.