Which region of the brain with reasoning and thinking and expressive functioning?

The cerebrum and the frontal lobes. To be more specific, the frontal lobes are part of the cerebral cortex and are the largest of the brain’s structures. They are the main site of higher cognitive functions. The substructures of the frontal lobes are involved in attention and thought, voluntary movement, decision–making, and language.

After a long conversation with my father, i learned to take my responsibilities more seriously.hope this : )