Final answer:
Not breastfeeding is a minor risk factor for breast cancer.
Step-by-step explanation:
One of the minor risk factors for breast cancer could be not breastfeeding. While breastfeeding is generally recommended to reduce the risk of breast cancer, not breastfeeding is considered a minor risk factor. Other major risk factors for breast cancer include gender (women are at higher risk), aging, and genetic risk factors such as mutations in the BRCA1 and BRCA2 genes.