Final answer:
The frontal lobe is separated from the temporal lobe by the lateral sulcus. This sulcus is a significant landmark that distinguishes the boundaries of the brain's lobes.
Step-by-step explanation:
The frontal lobe is separated from the temporal lobe by the lateral sulcus. This sulcus is one of the major surface landmarks of the cerebral cortex, marking the boundary between the frontal and temporal lobes, as well as between the temporal lobe and the parietal lobe, which lies superior to the lateral sulcus. The central sulcus separates the frontal lobe from the parietal lobe, whereas the longitudinal fissure divides the brain into left and right hemispheres. The cranial fossa, on the other hand, refers to depressions in the floor of the cranial cavity which contain the brain lobes; the anterior cranial fossa holding the frontal lobes.