Answer:
B. Free-radical theory
Explanation:
The free radical theory statutes that <em>ageing is the result of the accumulation of the damage to cells and tissues caused by reactive oxygen species</em> as a result of aerobic metabolism.
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Answer:
Energy is the capacity of a physical system to perform work. Energy exists in several forms such as heat , kinetic or mechanical energy, light, potential energy , electrical, or other forms.
Explanation:
.
raise spending to stimulate the economy