letter of the correct answer. 1. It is an interactions among living things and their environment enable them to live? A. community C. ecology B. ecosystem D. population 2. Which of the following is a beneficial interactions among living organism? A. mutualism C. competition B. predation D. parasitism 3. The kind of interaction in which both organisms benefit from each other. A. commensalism C. competition B. mutualism D. predation 4. It is the type of interaction where one organism benefits while the other is not harmed nor affected. A. predation C. parasitism B. commensalism D. competition Temne organism kills smaller