The ocean level rises when global temperature rises, due to ____________________. A) Both of these.B) Neither of these.C) melting of ice caps at the poles.D) thermal expansion of water.

Two main factors contributed to observed sea level rise.[6] The first is thermal expansion: as ocean water warms, it expands.[7] The second is from the contribution of land-based ice due to increased melting. The major store of water on land is found in glaciers and ice sheets.

So I don't know what C means: ICE caps. Sea ice melting has no effect on rise in sea level. Land ice, however, does.

The correct answer is A) Both of these.

Explanation:
The ocean level rises when global temperature rises due to two main factors: melting of ice caps at the poles and thermal expansion of water. Let's break down each factor:

1. Melting of Ice Caps at the Poles: As global temperatures increase, the Earth's polar ice caps, including those in the Arctic and Antarctic regions, start to melt. The melting of these ice caps adds additional water to the oceans, thus causing the ocean level to rise.

2. Thermal Expansion of Water: When water is heated, it expands. As global temperatures rise, the heat from the atmosphere is transferred to the ocean, causing the water to warm up and expand. This expansion leads to an increase in the overall volume of water, which in turn results in a rise in the ocean's level.

Both of these factors, the melting of ice caps at the poles and the thermal expansion of water, contribute to the rising ocean level. So, the correct answer is A) Both of these.