A natural or synthetic substance that when taken into a living body and affects its functioning or structure is called what? *

Poison

Explanation:

Poison is a substance (natural or synthetic), that causes damage to living tissues and can cause injuries or death.  Whether it is ingested, inhaled, absorbed, or injected through the skin.

c. spiritual heath is subjective.

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.