A. 99%
B. 97%
C. 95%
D. 96%
🧠 Explanation:
Greenland and Antarctica contain 99% of the world’s ice. “Contain” is a verb; “ice” is a noun. Alternatives like “hold” or “comprise” could be used. Studying polar regions is crucial in climatology, environmental science, and understanding global sea-level and climate change impacts.
