Consider statements about ecology: 1. A food chain shows energy flow. 2. A food web shows interconnected food chains. 3. The pyramid of energy is always inverted. Which are correct? MCQ with Answer and Explanation

A food chain is a linear sequence illustrating the transfer of energy and matter from one organism to another through consumption. A food web is a complex, interconnected network of multiple food chains, representing the realistic, multiple feeding relationships in an ecosystem. The pyramid of energy, which shows the amount of energy available at each trophic level, is always upright, never inverted, because energy is lost as heat at each transfer according to the 10% law. Thus, statements 1 and 2 are correct.