Answer:
B. Physical Weathering
Step-by-step explanation:
Physical Weathering is defined as the natural process in which rocks break down without changing their chemical composition.
Physical weathering is the cause of potholes in the city streets as streets or rocks have crevices, in which water get freeze in cold and get melts in warm weather, this continuous freezing and thawing creates ice wedges that forms potholes in roads and streets. An ice in the cracks expands in the form of water and push against the surrounding rock that makes the cracks wider and further breaks the rock.
Hence, the correct answer is "B. Physical Weathering".