What is the meaning of the term disturbance? Group of answer choices

an event that makes a species extinct) A

an event that changes a community) B

an event that decreases resource availability) C

an event that kills organisms) D

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.