Answer: Total volume of fat in his body is 
Explanation:
Density is defined as the mass contained per unit volume.
Given:
Density of fat cells = 
mass of fat cells = 20% of the mass of a 70 kg student's body is fat= 
Volume of fat = ?
Putting in the values we get:
Thus total volume of fat in his body is
This policy helps kids in school stay out of groups that influence them to smoke or do illegal activities.
Smoking increases the chances of getting lung cancer.
Answer: Ghrelin Hormone
Explanation:
Ghrelin hormone is a hormone produced by the stomach and is termed a hunger stimulant.
Ghrelin hormone promotes responses to food and food related odours.
Ghrelin hormone also controls the extent to which the brain reacts to food-related cues and is a major factor in heightened response to food cues.
To only engage in sexual contact when using protection (:
