Coral Polyp Statements Analysis

Let's evaluate each statement about coral polyps:

• Statement A: Corals are found mainly in the tropical oceans and seas. This statement is correct. Reef-building corals require warm, shallow, and clear tropical or subtropical waters to thrive.
• Statement B: Corals do not live in deeper waters i.e. not more than 200-250 feet below sea level. This statement is correct. Most reef-building corals depend on sunlight for their symbiotic algae (zooxanthellae), which limits their depth, typically to around 200-250 feet (approx. 60 meters).
• Statement C: There should be clean sediment free water for their growth. This statement is correct. Corals need clear water to allow sunlight penetration and are sensitive to sedimentation, which can smother them and block light.
• Statement D: Corals survive through coral bleaching in extreme hot conditions. This statement is incorrect. Coral bleaching occurs when corals are stressed by conditions like high temperatures; they expel their symbiotic algae, turning white. This is a sign of stress and often leads to coral death, not survival.

Conclusion

Based on the analysis, statements A, B, and C are correct, while statement D is incorrect. Therefore, the option including A, B, and C is the right choice.