Changes to _ can be ascribed to glacial melting. A. Earth’s surface b. CO2 levels c. Coral reefs d. Water pollution Please select the best answer from the choices provided A B C D
The correct answer and explanation is:
Correct Answer: A. Earth’s surface
Explanation (300 words):
The correct answer is A. Earth’s surface because glacial melting has a direct and significant impact on the physical features and structure of the Earth’s surface.
Glaciers are massive, slow-moving bodies of ice that shape the landscape through a process known as glacial erosion. As glaciers move, they carve out valleys, flatten mountains, and transport rock and sediment across long distances. When these glaciers melt, they leave behind noticeable geological features such as U-shaped valleys, moraines, fjords, and drumlins. Additionally, the retreat of glaciers can cause land that was previously compressed under the heavy weight of the ice to rebound or rise in a process called isostatic rebound. This can further alter the shape and elevation of the Earth’s crust in those areas.
As glaciers melt due to global warming and climate change, they also contribute to rising sea levels. This leads to coastal erosion, flooding, and the loss of land in low-lying areas, further changing the Earth’s surface. Regions that were once covered in ice may become lakes or wetlands, and new river systems may form due to the flow of meltwater.
Now, let’s briefly consider why the other options are incorrect:
- B. CO₂ levels: While increased CO₂ levels cause global warming, they are not a result of glacial melting. In fact, they are a cause, not an effect.
- C. Coral reefs: Coral reefs are more directly affected by ocean acidification and warming waters, not glacial melting.
- D. Water pollution: Glacial melting does not directly cause water pollution, though it can influence water flow and sediment.
In conclusion, changes to the Earth’s surface—including landscape reshaping, sea-level rise, and new geographical formations—are most directly ascribed to glacial melting.