This question could easily be answered by the process of elimination since the hypothalamus is the only option that corresponds to a region of the brain.
Within the hypothalamus, there are nervous cells responsible for producing proteins that create and inhibit the sensation of hunger. The proteins that cause hunger are the neuropeptide Y (NPY) and agouti-related peptide (AGRP), while the proteins that inhibit it are the cocaine and amphetamine-regulated transcript (CART) and the melanocyte-stimulating hormone (αMSH).
