Answer: A social unit; environment.
Explanation:
The social relationship relating all who support Kelvin is seen as a social unit, Kelvin's team brought them together and this relates them socially, this makes up the environment too.
The correct answer is A moderate level of anxiety is associated with optimal performance on exams.
Anxiety is the body's natural reaction to stress. It is an emotional state characterized by feelings of tension, worry and bad thoughts. It is important to note that anxiety is not always a disease. Anxiety in its normal state is healthy for the individual, as it drives him to carry out projects, prosper and plan for the future. What is alarming is the excess of that feeling.
Depending on the frequency and intensity of symptoms, anxiety can become a pathology in several ways: major depressive disorder or with certain personality disorders; generalized anxiety disorder; mental disorders; eating disorder; panic disorder, obsessive compulsive disorder.
State Constitution ( it is a document that lays down governmental structure , political processes and the limitation on the use of power by a state in the US . the state constitution will be in conformity with the federal structure of state and the national government under the US constitution .)