Fill in the blank and complete the sentence with the synonym of the underlined word:

The research focused on improving cognitive abilities, which are essential for processes such as learning, memory, and decision-making, aiming to enhance one's ______ faculties.

Option 1 -> "Intellectual" refers to mental processes involving reasoning, thinking, and understanding—directly synonymous with cognitive.

Option 2 -> "Physical" relates to the body and bodily functions, not mental processes.

Option 3 -> "Mechanical" pertains to machinery or automatic/routine actions, not mental cognition.

Option 4 -> "Emotional" concerns feelings and emotions, which are distinct from cognitive functions.

Hence, Option 1: intellectual -> Cognitive and intellectual are synonymous terms that both describe mental faculties involving thinking, reasoning, learning, and problem-solving. The sentence emphasizes improving these mental capacities. -> correct