Under which of the following climates would you expect physical weathering to be normally most active?

Under the hot desert climate, you would expect physical weathering to be most active. Physical weathering is the process by which rocks are broken down into smaller pieces without a change in their chemical composition. This process is influenced by factors such as temperature, pressure, and the presence of water. In hot desert climates, temperatures are high during the day and low at night, and there is limited rainfall. The high temperatures cause rocks to expand during the day and contract at night, which can lead to the formation of cracks and fractures. The limited rainfall means that there is little chemical weathering taking place, so the rocks are more susceptible to physical weathering. In contrast, savannah, warm temperate, and equatorial climates tend to have more rainfall and less temperature fluctuation, which can lead to more chemical weathering and less physical weathering. Therefore, based on the given options, the hot desert climate would be the best fit for the question of which climate would typically experience the most physical weathering.