Which of the following statements are correct with respect to food chains in an ecosystem?
I) Removal of 80% of tigers from an area will result in an increased growth of vegetation.
II) Removal of most of the carnivores will result in an increased population of deers.
III) The length of food chain is generally limited to 3 - 4 trophic levels in an ecosystem.
IV) Topmost trophic level possess the maximum energy.