Q. “It is a system formed by the interaction of all living organisms with each other and with the physical and chemical factors of the environment in which they live, all linked by transfer of energy and material” is?

[A] Biotic system

[B] Abiotic system

[C] Ecosystem

[D] Hydrosphere

Answer: C

Explanation: All plants, animals and human beings depend on their immediate surroundings. Often, they are also interdependent on each other.

  • This relation between the living organisms, as well as the relation between the organisms and their surroundings forms an ecosystem.
  • There could be an ecosystem of large rain forest, grassland, desert, mountains, lake, river, ocean and even a small pond.

Source: NCERT – Our Environment