What were the goals of the Marshall Plan and Truman Doctrine? (Choose 3 that apply) To protect communist countries

To provide economic aid to Europe

To promote democratic ideals

To prevent the spread of Communism

c.) biotic: snails; abiotic: temperature climate

according to worldatlas.com, the u.s. has an 86% literacy rate.

i believe the correct answer is b.

incident infrared radiation is blocked. visible and ultraviolet radiation heat   earth.

earth radiates infrared radiation. infrared radiation is blocked and heats earth. visible and shortwave radiation heat earth.

earth radiates longwave radiation

longwave radiation is reflected downward longwave radiation heats earth