Consider the following statements : 1. Some species of turtles are herbivores. 2. Some species of fish are herbivores. 3. Some species of marine mammals are herbivores. 4. Some species of snakes are viviparous. Which of the statements given above are correct?

Gives a categorical difference: land-dwelling 'tortoises' are described as herbivorous while 'turtles' are called omnivorous.

A student could use this rule to check whether some taxa labelled 'tortoise' (land) are herbivorous and whether any aquatic 'turtle' groups deviate from the stated omnivory (e.g., specialized feeders).

Mentions seagrass and lists 'Green turtle' among sea turtles nesting on Indian coasts, linking that species to seagrass habitat.

Knowing seagrass is a plant, a student could investigate whether species associated with seagrass (e.g., Green turtle) feed on it and thus are herbivorous.

Lists the Green and other named sea turtles found in Indian waters, providing specific species to examine for diet differences.

A student could take the named species (Green, Olive ridley, Hawksbill) and look up or test diet differences to see which are plant-eaters.

Defines the 'grazing food chain' and that herbivores are primary consumers eating plant material.

Combine this trophic concept with species-habitat links (e.g., turtle species found on seagrass beds) to infer possible herbivory and then verify with species-specific diet data.

Gives general examples and definition of herbivores/omnivores vs carnivores, establishing the classification framework for animal diets.

Use this classification framework to categorize turtles/tortoises by observed diets or by known habitats (land vs aquatic) to hypothesize which are herbivores.