Final answer:
Weathering agents such as ice glaciers, rivers, gravity, and frost wedging result in geological structures like U-shaped valleys, canyons, landslides, and rock fractures, respectively.
Step-by-step explanation:
The matching of weathering agents with the structures or events they cause is pivotal in understanding geological processes. Here are the matches:
- Ice glacier - U-shaped valley
- River - Canyon
- Gravity - Landslide
- Frost wedging - Frost wedging
Ice glaciers are known for carving U-shaped valleys as they move down mountainous regions. Flowing rivers erode the soil and rock forming deep, narrow canons. Gravity can make the saturated soil and rock move downhill rapidly, causing landslides. Lastly, frost wedging occurs when water seeps into cracks, freezes, and expands, which can lead to rock fracturing and contributes to the weathering of rock surfaces.