Final answer:
The occipital lobe is the most posterior brain lobe, located at the back of the head and responsible for processing visual information.
Step-by-step explanation:
The lobe of the brain that is situated most posteriorly (back of the head) is the occipital lobe. The occipital lobe is located at the very back of the brain, below the parietal lobes, and it contains the primary visual cortex, which is responsible for interpreting incoming visual information. It is primarily involved in vision-seeing, recognizing, and identifying the visual world. Other brain lobes, like the parietal and temporal lobes, are responsible for different functions such as sensation, memory formation and retrieval, and auditory processing.