Question

which change contributes to an adolescents lessening susceptibility toward respiratory infections? greater exposure to germs from increased social activity the shrinkage of the lymphoid system the increase in sex hormones the growth spurt

Explanation:

The lymphoid system is crucial for the immune response. As adolescents grow, the shrinkage of the lymphoid system (which reaches its peak size in childhood) is a normal physiological change. This change, along with the development of a more mature immune system over time (not directly related to greater exposure to germs as that could potentially lead to more infections initially in some cases, sex hormones mainly affect sexual development and secondary sexual characteristics, and growth spurt is about physical growth in height and weight rather than immune - related susceptibility to respiratory infections), contributes to lessening susceptibility to respiratory infections.

Answer:

the shrinkage of the lymphoid system