What term describes the physical and biological components of a place and how they interact?

• A. Biotope
• B. Habitat
• C. Ecosystem
• D. Niche

Answer: (C)

The concept here is a system that includes living things and their physical surroundings, and the ways they interact with each other. That system is an ecosystem. An ecosystem covers both the biotic parts (plants, animals, microbes) and the abiotic parts (air, water, soil, climate) and the processes that connect them—energy flowing from producers to consumers, decomposers returning nutrients, and interactions like predation, symbiosis, and competition. Boundaries can be any size, from a pond to a forest to a park, but the key idea is that the whole together forms a functioning system.

Biotope refers mainly to the physical environment of an area, not the living things or their interactions. Habitat is the place where a particular organism lives. Niche is the role or job of an organism within its environment, including how it uses resources. These describe parts or aspects of the larger system, not the full interconnected system itself.