Final answer:
B) Stimulation of the lateral hypothalamus is the correct factor that signals hunger in our body. It activates feeding behavior when we need to eat. Other options mentioned in the question are associated with signaling satiety.
Step-by-step explanation:
The student asked which factor signals hunger in our body. The presence of various physiological mechanisms determine when we feel hungry.
When our blood glucose levels fall, the pancreas and liver respond by releasing chemical signals that trigger the feeling of hunger and encourage eating behavior.
Among the choices provided, option (B) Stimulation of the lateral hypothalamus is a factor that signals hunger. The lateral hypothalamus, when activated, promotes feeding behavior.
The other options provided relate to the signaling of satiety or the cessation of hunger rather than hunger itself.