Final answer:
The smell-responsive brain area that responds to multimodal stimuli, like the sight and smell of food, in humans is located in the temporal lobe.
Step-by-step explanation:
In humans, the smell-responsive brain area that responds to multimodal stimuli, such as the sight and smell of food, is located in the temporal lobe. Olfactory neurons project from the olfactory epithelium to the olfactory bulb and from there, the olfactory signals travel to several brain regions including the olfactory cortex, the frontal cortex, the thalamus, and other areas within the limbic system and hypothalamus. A key structure within the temporal lobe related to smell is the olfactory cortex, which plays an important role in processing odors and forming associations with long-term memory and emotional responses, explaining why particular smells can potentiate memories and emotions. The temporal lobe also contains the hippocampus, which is vital for memory formation including spatial, autobiographical, declarative, and episodic memories.