Claire extends her left calf muscle then relaxes it, concentrating on the tension leaving the muscle as she does so. Claire then tenses and relaxes her left quadriceps, again noting the flow of tension from the area. Claire is engaged in:
A. systematic desensitizationB. mindfulnessC. biofeedbackD. progressive muscle relaxation

Progressive muscle relaxation

Explanation:

Progressive muscle relaxation is a relaxation technique used to relieve stress and tension. It is done by tensing one's muscles while breathing in and relaxing it while breathing out. This process helps body more relaxed and hence less tensed.

Progressive muscle tension helps to make one aware of the sensations connected to stress and tension and further helps to identify and manage the impact of the tension or stress.

Generally, progressive muscle tension has been shown to relieve tension, stress, pain and anxiety.

From the explanation, Claire is engaged in progressive muscle relaxation.

answer: c

explanation:

the backbone of the dna and rna compound is sugar phosphate.