The United States Generates Its Energy from Several Sources

question 42

Multiple Choice

The United States generates its energy from several sources.What is the most important energy resource,which accounts for over 40% of the energy generated in the U.S.?

• A) coal
• B) natural gas
• C) nuclear power
• D) petroleum (oil)
• E) wood

---

Definitions:

Blood Pressure

The force that circulating blood exerts against the walls of the arteries as the heart pumps, measured in millimeters of mercury (mmHg).

Artery

A blood vessel that carries oxygenated blood away from the heart to the body's tissues.

Atherosclerosis

a condition characterized by the hardening and narrowing of arteries due to plaque buildup, which can lead to cardiovascular disease.

Arteriosclerosis

The thickening, hardening, and loss of elasticity of artery walls, which can restrict blood flow to organs and tissues.