Rising sea levels are a result of a. increased amounts of precipitation. b. melting ice only. c. increased carbon dioxide levels in the water. d. melting ice and expansion of heated water.

d. Melting ice and expansion of heated water.

Explanation:

As the planet gets warmer, sea level rises.

The two major causes are melting of ice and expansion of seawater.

It is estimated that rising sea levels are caused

One-third by melting of ice in Greenland and Antarctica One-third by melting of ice in mountains One-third by thermal expansion of the warmer water

a. is wrong. Increased precipitation comes largely from the oceans by the water cycle.

b. is wrong. Melting ice is responsible for only two-thirds of sea-level rise.

c. is wrong. Increased carbon dioxide levels increase the acidity of the water but have little effect on the volume.