Are the cases of cancer uniform throughout the world? include one example to back up your answer

No, they are not.  

Explanation:

There is a higher incidence of cancers in higher-income countries.

This is strongly correlated with factors such as smoking, obesity, and alcohol intake.

The first diagram shows the worldwide share of the population with cancer. The United States and Canada lead the pack with the highest cancer rates.

The second diagram shows the cancer rates for a few selected countries. Japan, Australia, and New Zealand are in the middle of the pack with cancer rates of 2.5 % to 3.0 %.

I find it interesting that the cancer rate in China was fairly stable at 0.8 % until about 2006. The cancer rate then increased to 1.45 %.

the answer is "a.) well–developed vascular system."

explanation: