railway RRB JE (CBT I + CBT II) Mock Test 2024 General Knowledge Ecology and Environment Ecology and Functions of an ecosystem
Which of the following best defines an ecosystem?
1
A system formed by the interaction of living organisms with each other and their surroundings.
2
A collection of abiotic factors that influence the organisms living within it.
3
A system where both living and non-living components interact to sustain life.
4
A geographical area that is composed only of non-living components.