Final answer:
Mammals achieved rapid evolutionary success due to their characteristics related to learning and general behavioral flexibility. This includes their capacity for adapting to different environments and adjusting behaviors.
Step-by-step explanation:
The statement 'The mammals achieved rapid evolutionary success because they possessed several characteristics related to learning and general behavioral flexibility' is True. Mammals have achieved evolutionary success due to their ability to learn and adapt to different environments. This includes their capacity for behavioral flexibility, which allows them to adjust their behaviors in response to changes in their surroundings. For example, early generations of mammals may have migrated to improve their chances of survival and passed on this behavior to their offspring. Mammals also possess other characteristics that contribute to their rapid evolutionary success. They live in social groups, which enhances their survival and reproduction opportunities. Additionally, mammals have various ways of moving, allowing them to navigate their environments efficiently.