Aperson's ability to reason speedily and abstractly (for example, in solving novel logic problems) decreases slowly up to about age 75, then more rapidly, especially after age 85. this type of ability is also known

Fluid intelligence

Explanation:

Fluid intelligence is the intelligence that is based on the ability of mind for solving issues and thinking logically in seamless manner. A person does not face any obstruction in finding solution in this intelligence. Identifying patterns, understanding novel problems, relationships etc are the task performed through fluid intelligence.

This ability of mind tends to decrease in accordance with aging process. As a person grows old, restrictions in fluid intelligence occur that decreases the capacity of understanding and solving problems continuously.

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answer; (trauma);