The process of changing complex foods into simpler substances to be absorbed is called

a problem could be dealing witj emotional stress..all of these factors contribute to emotional stress.

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.