Question

1. which type of mechanical weathering is most common in mountainous regions in the middle latitudes?

○ unloading

○ frost wedging

○ oxidation

○ biological activity

Explanation:

In mountainous regions of middle latitudes, frost wedging (also called freeze - thaw weathering) is very common. This is because these areas often experience cycles of freezing and thawing. When water enters cracks in rocks and then freezes, it expands, which exerts pressure on the rock and causes it to break apart. Unloading is more related to the removal of overlying rock layers, oxidation is a chemical weathering process that may not be as dominant in middle - latitude mountainous regions as frost wedging, and biological activity - related weathering may not be the most common compared to frost wedging in this context.

Answer:

C. frost wedging (assuming the third option is labeled as C, with the option text "frost wedging")