Final answer:
The statement is false. Subtropical regions generally have warmer climates compared to the cooler continental steppe regions which face more extreme temperature variations and colder winters.
Step-by-step explanation:
The statement that the subtropical climate region is cooler than the continental steppe region is false. Subtropical regions generally have milder and more stable climates compared to the more extreme conditions found in continental steppe, or Type D, climates, which have cooler winters due to their location in the interiors of continents, away from moderating bodies of water.
Type D climates, often possessing a mixture of moderate to hot summers and cold winters, can vary significantly in temperature throughout the year. In contrast, subtropical regions, which can also include subtropical deserts, typically experience hotter daily temperatures and very low precipitation. However, with their relatively stable environmental conditions, they don't have the extreme cold seen in continental steppe regions.
Moreover, the biodiversity in subtropical regions tends to be higher than in the colder climates, partially due to more stable and generally warmer environments that promote specialization into various ecological niches. While the subtropical desert may have extreme temperatures, they are generally warmer throughout the year than the colder continental steppe regions.