Antarctica holds about 60 percent of the world's fresh water, locked in an ice sheet that averages over a mile thick. Even small changes in this ice sheet's mass have outsized consequences for global sea levels. Recent satellite measurements show the continent losing ice at an accelerating rate — a trend that has drawn intensifying attention from oceanographers and policy planners.
Which choice best states the main idea of the text?
- Acheck_circle
Accelerating ice loss in Antarctica has significant implications for global sea levels.
- B
Satellites have only recently been deployed to study Antarctica.
- C
The Antarctic ice sheet is over a mile thick.
- D
Antarctica is the coldest continent.
Explanation
The passage's main idea is the accelerating loss and its sea-level implications — C. A is a supporting fact; B is not stated; D is unsupported.