In a paragraph, describe the differences between external and internal radiation therapy. (site 2)

Internal is when radioactive materials are placed,temporarily or permanently ins infected area. (affected area) Usually delivered high radiation to cancerous areas.
For external radiation is when you use a machine (high-energy) rays outside the body for the tumor.

If you by personality this external (extrovert) you are motivated by other people while internal (introvert)you motivate yourself. 

One health risk and the most important one is obesity, it can cause obesity since you are not leveling your food like you wont ever get full because your just snacking between foods which can also cause diabetes.hope this : )