What makes people get certain types of cancer?

Cancer risk: Family clustering, genetic predisposition. It depends on the cancer: lung-throat-oral-prostate-bladdre= smoking. Radiation exposure (some thyroid cancer), not having babies or old age whe giving birth may increase risk of ovarian cancer, male (testicular cancer), female breast ca.. It is a complex question to answer. Is better to see docotor and do a evaluation in order to stratify risk factor.

Complicated question: The causes of cancers are many and varied. The question cannot be answered simply. Enviromental and genetic factors play roles, and cancer is more common as we age. Many times we are just not sure why people get cancer.