How many cells are made with meiosis

Which description provides the best objective summary of the article in the passage?

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above

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.