Biosphere is:
a. a component in the ecosystem
b. composed of the plants present in the soil
c. life in the outer space
d. composed of all living organisms present on earth which interact with the physical environment
The answer is the option (d) composed of all living organisms present on earth which interact with the physical environment
Explanation: Biosphere is the thin zone of interaction of hydrosphere, atmosphere and troposphere where living beings are found.