Which of the following is not part of a feedback loop?

Which principle described by psychologist martin seligman fosters an overall positive attitude by using thinking and behavior techniques to resist negativity?

Astructural difference between the trachea and esophagus that prevents the trachea from collapsing is the presence of: a) smooth muscle b) skeletal muscle c) respiratory cilia d) rings of cartilage

Last 5 benefits of physical activity and identify each benefit as either a physical mental and emotional or social benefit