Which part of the brain is primarily involved in processing language comprehension?

Wernicke's area is primarily involved in processing language comprehension. Located in the posterior part of the left hemisphere, typically in the temporal lobe, this area is crucial for understanding spoken and written language. Damage to Wernicke's area can result in Wernicke's aphasia, characterized by fluent but nonsensical speech and significant challenges in understanding language.

Broca's area, while also related to language, primarily focuses on language production and the structuring of sentences, rather than comprehension. The hippocampus is mainly associated with memory formation and spatial navigation, not language. The cerebellum plays a critical role in motor control and coordination and has some connections to language but is not central to language comprehension itself. Therefore, Wernicke's area is the correct answer as it directly handles the comprehension aspects of language processing.