Which of the following statements about trophic cascades is TRUE? A. A trophic cascade occurs when predation limits herbivore abundance, and plant population sizes are reduced. B. A trophic cascade occurs when a predator is removed, allowing plants to expand, which then limits herbivores. C. In a trophic cascade, plant abundance is independent of the number of trophic levels in the community. D. A behavioral cascade, which often involves the perception of predation risk, is a type of trophic cascade

B) is the correct option

Explanation:

Trophic cascade defines the the indirect control that a top predator exerts on species at lower, nonadjacent trophic levels

In a trophic cascade, ecological processes and consequences initiated by a change at the top of the food chain work their way down to lower trophic levels and eventually re-balance the ecological relationships of numerous speciesTrophic cascades occur when predation limits herbivore abundance and therefore the plant population increasesTrophic cascades also occur when predator is removed then the plant growth will be limited due to excess growth of herbivores;In a trophic cascade the plant abundance is dependent on the number of trophic levelsTrophic cascades can indirectly control the entire ecosystem and occurs when a trophic level is suppressed

The correct answer is b

The correct answer is d