Which natural phenomenon shaped the geography of the land?

• A. Glaciers
• B. Rivers
• C. Volcanoes
• D. Tides

Answer: (A)

Moving ice shapes land by eroding and depositing as it flows, leaving lasting marks on the landscape. When glaciers advance, they grind and pluck rock, carving broad, U-shaped valleys and creating large basins. As they melt, they leave behind features such as moraines, drumlins, and other glacial deposits that indicate where ice once stood. This process can sculpt continental-scale geography, producing dramatic changes that aren’t matched by other forces in many regions. For example, huge ice sheets carved out basins that later filled with water to form large lakes, like the Great Lakes region, and shaped mountain and valley terrain in ways rivers alone would not. While rivers, volcanoes, and tides also alter the surface, glaciers leave the most distinctive and widespread inland geographic signatures, making them the best answer to what shaped the land’s geography.