What type of cancers does strong evidence suggest physical activity reduces the risk of?

Physical activity has been shown to significantly reduce the risk of certain types of cancers, with colon, breast, and endometrial cancers being among the most extensively studied and supported by strong evidence. Regular engagement in physical activity can help control body weight, improve insulin sensitivity, and enhance immune function, all of which contribute to a lower risk of developing these specific cancers.

For colon cancer, physical activity is particularly effective as it helps maintain gastrointestinal function and reduces the time that potential carcinogens are in contact with the intestinal lining. As for breast cancer, especially in postmenopausal women, physical activity contributes to lower estrogen levels, which can be a risk factor for breast cancer development. In the case of endometrial cancer, being physically active helps in weight management, thus reducing the risk associated with obesity and excess estrogen exposure.

The other types of cancers listed in the other answer choices do not have the same level of strong evidence linking physical activity to a reduced risk as colon, breast, and endometrial cancers do, making the selection of this answer particularly relevant and supported by research findings.