What are two factors that increase a woman's risk for breast cancer?
answer maintaining a healthy weight and exercising regularly
eating a low fat diet and getting enough sleep
obesity and genetic factors
no family history and no drugs or alcohol use

Obesity and genetic factors is usually a strong risk factor for many different diseases and it's no difference in this case - people/women who are obese and have a family history of breast cancer also possibly have a higher likelihood of developing it themselves. 

Centriole.centrioles are present in animal cells but are usually absent in plant cells.