If someone could me with this question, it would be a pleasure.

Which direction does the energy flow in this energy pyramid ?

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.

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?