Give the full form of $CFC$.

Producers,consumers,and decomposers are which type of components of an ecosystem?

How does the concentration of a pesticide change once it enters a food chain?

Distinguish between food chain and food web.

What is the difference between the food habits of organisms belonging to the second and fourth trophic levels? Give one example of organisms belonging to each of these two trophic levels.

Consider a food chain consisting of wheat, rat, snakes, and peacock. What will happen if all the snakes are killed?