Answer:
Fluid intelligence
Step-by-step explanation:
The fluid intelligence talks about the mental operations that a person uses to solve novel problems without any previous knowledge. It is the ability to analyze new tasks, logical reasoning, identify, relate and solve concepts. It is influenced by the maturation process and deteriorates after 20 years, because it is determined genetically.
For this, according to John Horn, fluid intelligence steadily declines from middle adulthood onward.