Appetite is triggered by

The correct answer is: D. Environmental cues such as the smell or taste of food.

Appetite is the desire to eat. It is a complex physiological process that is influenced by a variety of factors, including:

• Hormones: Ghrelin, a hormone produced by the stomach, increases appetite. Leptin, a hormone produced by fat cells, decreases appetite.
• Nutritional status: When the body is low on energy, it releases hormones that increase appetite.
• Environmental cues: The smell, taste, and sight of food can all trigger appetite.
• Emotions: Stress, anxiety, and boredom can all increase appetite.

Stomach enzymes and pancreatic enzymes are involved in digestion, not appetite.

Physiological drive is a general term that refers to the body’s need for food, water, sleep, and other basic necessities. It is not a specific factor that triggers appetite.