Very short-term bursts of stress can have a beneficial effect on many biological systems, including the system, which is your body's frontline defense against infection and cancer.

a. nervous

b. respiratory

c. immune

d. circulatory

Very short-term bursts of stress can have a beneficial effect on many biological systems, including the immune system, which is your body's frontline defense against infection and cancer.

c

C) Immune

Explanation:

Very short-temr bursts of stress can have a beneficial effect on many biological systems, incuding the immune system, which is your body's frontline defense against infection and cancer.

a physical change is being made.