Diverse mammals developed and began to flourish in the Cenozoic era . Which of the following also began to develop and flourish during this time ?

Me the formula cacl2 represents the compound

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.

Which describes a grizzly bear’s habitat?