To reduce your cancer risks, you can stay away from anything that blatantly affects you in a negative way. Some of things things include drugs, unhealthiness, and not being active like you should be. Those are some of many things you can do to avoid cancer risks.
For the second question, I cannot answer that for you. Think about the question in reference to yourself; are you active? Do you eat healthy? Do you smoke or vape? Keep these things in mind when answering the second question. If you need any extra help, let me know and I will gladly assist you.