Which of the following is true about ice sheets? They are the smallest type of glacier. They flow in all directions. They usually flow down valleys. They are found only in high mountain areas.

The correct statement about ice sheets is: - **They flow in all directions.** **Explanation:** 1. **They are the smallest type of glacier.** - **False.** Ice sheets are actually the largest type of glacier, covering vast areas like Antarctica and Greenland. 2. **They flow in all directions.** - **True.** Unlike valley glaciers, which flow down specific pathways (usually valleys), ice sheets spread out and flow in multiple directions due to their immense size and mass. 3. **They usually flow down valleys.** - **False.** This characteristic is typical of smaller valley glaciers, not ice sheets. 4. **They are found only in high mountain areas.** - **False.** Ice sheets are found on continental scales, such as in Antarctica and Greenland, and are not confined to high mountain regions. **Summary:** Among the provided statements, only the second one ("They flow in all directions.") is true regarding ice sheets. **Answer:** Only the second statement (“They flow in all directions”) is true about ice sheets.