What cognitive function is linked to the frontal lobe?

The frontal lobe is primarily associated with higher cognitive functions, including abstract thinking. This area of the brain is responsible for complex processes such as reasoning, problem-solving, planning, and understanding concepts that are not immediately present or concrete. Abstract thinking allows individuals to make connections between different ideas, think critically, and engage in creative thinking, which are key elements of cognitive function.

Other functions mentioned in the options relate to different areas of the brain. Visual processing is primarily the role of the occipital lobe, sensory input processing is mainly handled by the parietal lobe, and speech comprehension is centered in areas of the temporal lobe, notably Broca's and Wernicke's areas. Thus, the association of abstract thinking specifically with the frontal lobe highlights its unique role in higher-order cognitive tasks.