Question

PLEASE HELP

The image below shows a waterfall located in Costa Rica. Which of the following statements describes how the waterfall was formed?

A) Harder rock underneath eroded faster than the softer rock above, causing the top rock to protrude outward.

B) Softer rock underneath eroded more slowly than the harder rock above, causing the bottom rock to protrude outward.

C) Softer rock underneath eroded faster than the harder rock above, causing the top rock to protrude outward.

D) Harder rock underneath eroded more slowly than the softer rock above, causing the bottom rock to protrude outward.

Answer 1

Answer: C. Softer rock underneath eroded faster than the harder rock above, causing the top rock to protrude outward.

Explanation: A common way waterfalls are formed is by a river making its course over a top layer of resistant bedrock before falling onto the softer rock, which erodes faster leading to a high fall.