Question

which of the following best describes the impact of glaciers upon the surface of the earth?
a. ice buried continents under a few hundred feet of ice.
b. glaciers scraped across the surface and altered landscapes and the course of rivers.
c. the passage of glaciers created new ecosystems.
d. all of the above.

please select the best answer from the choices provided

a
b
c
d

Explanation:

• Continental ice sheets during glacial periods did bury large continental areas under hundreds of feet of ice.
• Glacial movement scrapes and erodes bedrock, reshaping landscapes (e.g., creating U-valleys) and altering river courses by carving new channels or damming existing ones.
• The retreat of glaciers leaves behind unique landforms (like moraines, kettle lakes) that form the basis for new, distinct ecosystems adapted to those environments. All three options describe valid impacts of glaciers on Earth's surface.

Answer:

d. All of the above.