Q. Consider the following statements:

1. The prickly pear cactus, an invasive species, was controlled in Australia by introducing a moth from its natural habitat.
2. Predators contribute to maintaining species diversity in a community.
3. On the American Pacific Coast, the starfish Pisaster acts as a key predator.

Which of the above statements is / are correct?
Answer: All of the above
Notes: The prickly pear cactus was successfully controlled in Australia by introducing a cactus-feeding moth from its native habitat. Predators play a crucial role in maintaining species diversity by checking competition among prey. Pisaster starfish is a keystone predator along the American Pacific Coast, confirming all three statements are correct.