Question

question 3 of 32
research shows that the average height of all earths oceans is increasing over time. which of the following is a possible cause?
a. earths rotation is changing direction.
b. upwellings are becoming more frequent.
c. polar ice caps are melting.
d. low tides are disappearing.

Explanation:

When polar ice caps melt, the water from the ice enters the oceans, increasing the volume of water in the oceans and thus causing the average ocean height to rise. Earth's rotation changing direction would not directly cause ocean - level rise. Upwellings are related to the movement of water from deeper to shallower areas and do not cause overall ocean - level increase. Low tides disappearing is not a cause of the long - term increase in average ocean height.

Answer:

C. Polar ice caps are melting.