Erica is part of a research group that is studying a group of software executives. She is trying to determine the relationship between workplace stress and cancer. As part of the same study, she also advises her subjects on ways to counter workplace stress. Erica is most likely a .

Health psychologist

Explanation:

A health psychologist  focuses on how emotional, social emotional and mental factors affect the well-being of a person. They work persons trying to cope with mental of physical illnesses, by managing their pain or stress.

Health psychologists work by changing behaviors of their patients to improve their over health or manage diseases or abnormal health conditions like, stress, cancer, weight gain, smoking etc.

They study individuals reactions to diagnosis and various factors that can affect the choices of treatment of the individual.

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explanation:

answer; elasticity of the lungs decreases;