Assertion: The pyramid of energy is always upright. Reason: Energy flow is unidirectional and some energy is always lost as heat at each step. Which of the following options is correct?
1) Both assertion and reason are true and reason is the correct explanation of the assertion.
2) Both assertion and reason are true but reason is not the correct explanation of the assertion.
3) Assertion is true but reason is false.
4) Assertion is false but reason is true.
