Final answer:
Ghrelin is the gastrointestinal hormone that stimulates appetite and increases the consumption of food.
Step-by-step explanation:
The gastrointestinal hormone that has the effect of increasing the consumption of food is B. Ghrelin. Unlike other gastrointestinal hormones, ghrelin functions as a hunger signal. It is produced in the stomach and stimulates appetite, leading to an increase in food intake. Hormones such as gastrin stimulate the secretion of gastric acid, and cholecystokinin (CCK) signals the secretion of digestive enzymes and bile but does not increase food consumption.