What characterizes the temperate climate zone?

The temperate climate zone is characterized by having distinct seasons, which include cold winters and mild summers. This type of climate typically experiences moderate temperature ranges, allowing for significant variation throughout the year. The seasonal changes can lead to a variety of weather patterns, including rain and snow in winter and warmer temperatures in summer.

In contrast, the other options describe climates that do not align with the characteristics of the temperate zone. Hot and dry conditions year-round would be more indicative of a desert climate. Constant high humidity and heat suggest a tropical climate, where temperatures usually remain warm all year with significant moisture. Extremely cold with no vegetation describes polar climates, where the cold conditions prevent most plant life from thriving. Thus, the defining features of cold winters and mild summers make the temperate climate zone distinct.