Vance has learned to voluntarily control the activation of his autonomic nervous system as part of the treatment for an anxiety disorder. this is an example of

In this case, the person had an anxiety disorder. The anxiety is in voluntary controlled by the autonomic nervous system in humans.

The biofeedback is a  mechanism, by which a person can control the working of involuntary system. This is done by the restriction of autonomic nervous system to specific stimuli.

In this case, the autonomic nervous system is trained to act according to the thoughts and the feelings.

Hence, the given situation is an example of Biofeedback.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: