Which portion of the brain is most likely damaged if the person has difficulty seeing and hearing?
The lower side and to the rear.
More technically: the temporal and occipital lobes; possibly a region covering the junction.
http://drdavespsychologypage.intuitwebsites.com/Brain__General_Anatomy.pdf
If a person is experiencing difficulty both in seeing and hearing, it could suggest damage to the occipital lobe in the brain. The occipital lobe is primarily responsible for visual processing, interpretation, and perception. It is located at the back of the brain. Damage to this area can result in visual impairments, such as blurred vision, partial loss of vision, or difficulty recognizing objects and faces.
However, it's worth mentioning that hearing impairment usually involves other areas of the brain, primarily the temporal lobes and the auditory cortex. These are responsible for processing sound and interpreting auditory information. If a person is experiencing difficulty hearing along with visual problems, it is possible that multiple areas of the brain are affected.
It's important to note that a thorough medical examination and diagnosis by a healthcare professional would be necessary to determine the precise cause and location of the brain damage in such cases.