Question

which of the following is the best example of how factors within a persons environment can influence their personal health?
a. regular exercise decreasing a persons cholesterol
b. exposure to certain chemicals increasing the risk of cancer
c. a persons genetics increasing their risk of a heart attack
d. eating too much sugar increasing a persons risk of diabetes

Explanation:

环境因素指外界环境中的因素。A选项运动、D选项饮食更多是个人行为选择；C选项遗传是内在因素；B选项接触某些化学物质，化学物质属于环境中的因素，其影响健康符合题意。

Answer:

B. exposure to certain chemicals increasing the risk of cancer