Assertion $(A):$ $A$ natural ecosystem is usually self-sustainable.
Reason $(R):$ An ecosystem having producers,decomposers,and a source of energy is self-sustainable. Select the correct answer from the options given below:

  • A
    Both assertion and reason are true and reason is the correct explanation of assertion
  • B
    Assertion is true but reason is false
  • C
    Both assertion and reason are false
  • D
    Both assertion and reason are true but reason is not the correct explanation of assertion

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