Final answer:
Physical weathering from temperature changes is most common in regions with extreme temperature fluctuations, such as deserts and high mountain ranges. On the other hand, it is least common in regions with more stable temperatures, such as tropical rainforests or regions near the equator.
Step-by-step explanation:
Physical weathering from temperature changes is most common in regions with extreme temperature fluctuations, such as deserts and high mountain ranges. In these areas, the expansion and contraction of rock due to temperature changes can cause the rock to crack and break apart, leading to physical weathering.
On the other hand, physical weathering from temperature changes is least common in regions with more stable temperatures, such as tropical rainforests or regions near the equator. In these areas, the lack of extreme temperature fluctuations reduces the likelihood of significant physical weathering from temperature changes.