किस प्रकार के जैविक अंतःक्रिया में एक प्रजाति को लाभ होता है जबकि दूसरी प्रजाति को हानि पहुँचती है?

Which of the following statements about ecological interactions are correct? 1. In predation, one species benefits and the other is harmed. 2. In commensalism, one species benefits and the other is unaffected. 3. In amensalism, both species are harmed. 4. In mutualism, both species benefit.

Competitive interactions between organisms can occur for which of the following resources? 1. Shelter2. Water3. Food