Which of the following describes fluid intelligence?

Fluid intelligence refers to the capacity to reason swiftly and abstractly, enabling individuals to solve new problems and think logically without the need for previously acquired knowledge. This type of intelligence plays a crucial role in tasks that require clear and quick thinking, such as problem-solving, pattern recognition, and understanding complex relationships. It is distinct from crystallized intelligence, which involves using learned knowledge and experience to tackle problems.

The other options, while related to cognitive functioning, do not specifically capture the essence of fluid intelligence. For instance, using skills and knowledge to solve problems pertains more to crystallized intelligence, where past learning is applied. Understanding and reading one's own emotions relates to emotional intelligence, which encompasses recognizing and managing personal emotions rather than abstract reasoning. Comparing test scores to a group addresses normative testing and is focused on assessment rather than cognitive abilities, making it unrelated to the concept of fluid intelligence itself. Thus, the ability to reason quickly and abstractly is the fundamental characteristic that defines fluid intelligence, leading to it being the correct choice in this context.