1. Chengdu is closer to the equator than Harbin. Which location has a colder air temperature and why?
• A Harbin, because less energy is transferred from the sun directly to the surface, and then from the surface to the air.
• B Harbin, because less energy is transferred from the sun directly to the air.
• C Chengdu, because less energy is transferred from the sun directly to the surface, and then from the surface to the air.
• D Chengdu, because less energy is transferred from the sun directly to the air. ​