how can i prevent cancer for my cat?

Avoid cheap foods with chemical preservatives, feed a proper diet, keep her away from chemical cleaners, and indoors where she won't come into contact with lawn and garden chemicals. Other than that it often comes down to genetics, which you cannot control.

Great question. How can you prevent cancer humans?

Invest in some quality food containing meat, not corn or anything like that. Make sure you cat gets exercise. Mine loves chasing around bouncy balls or catnip toys. Also, try to keep your cat happy.