Write the number оf sentence thаt best summаrizes the pаragraph belоw. 1Althоugh hunger is clearly a motive that is tied to biological needs, psychological factors are also involved in the regulation of food intake. 2Learning plays a powerful role in determining what we eat, when we eat (we are often ready to eat at our customary times for eating, even if we have just had a snack), and how much we eat (many families encourage and model overeating). 3 Studies of nonhuman animals show that even rats and chimpanzees learn what to eat by watching older animal. 4. Emotions also play a role in eating. 5 People who are anxious tend to eat more than usual and people who are depressed may lose their appetites. 6. For people who are trying to control their weight, incentives—external cues that encourage us to eat—can motivate behavior in troublesome ways. 7. The smell of baked bread makes people feel hungry; passing a fast-food restaurant creates a craving for French fries. 8 Laboratory research with animal has shown that incentives can be powerful enough to push weight above the natural set point. 9 Like humans, rats will overeat to the point of obesity if they have easy access to large quantities of tasty, high-quality food.