Describe the life styele cancer and explain factors that contribute to the cancer
Since this is not my area of expertise, I searched Google under the key words "life style causes of cancer" to get these possible sources:
http://www.google.com/search?client=safari&rls=en&q=life+style+causes+of+cancer&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.