Which one of the following is an exhaustible but renewable natural resource?

Coral reefs are not found in which one of the following regions?

Coral reefs are not found in which one of the following regions?

If you want to see gharials in their natural habitat, which one of the following is the best place to visit?

Which of the following lakes of India is a Ramsar site?

Which of the following statements is not true about "ecological niche" ?