GEOLOGY

Detailed explanation-1: -The order of a food chain looks like this – sun (or light energy), primary producers, primary consumers, secondary consumers, and tertiary consumers.

Detailed explanation-2: -Each living thing is a part of multiple food chains – for example, grass is a part of the food chain: grass → grasshopper → frog → snake → eagle, and also of the food chain: grass → deer → tiger. All of the interconnected and overlapping food chains in a habitat make up a food web.

Detailed explanation-3: -The grazing food chain starts from living green plants and goes to herbivores and then to carnivores. In the food chain Grass → Rabbit → Fox → Tiger, grass is producer, rabbit is a herbivore, and fox and tiger are carnivores. Thus, this is a grazing food chain.

Detailed explanation-4: -Thus, the correct option is ‘C’. Phytoplankton → Zooplankton → Fishes.