It is possible to change body composition. to do this you should try to

a.) eat small more frequent meals

b.) continue to eat until you are stuffed

c.) do not skip breakfast

d.) both a and c

D.) Both A and C.
Because your body will learn that i will get food more frequently even if is just a small portion and will burn more fat(energy) during that short time period and breakfast is the first meal of the day after nit eating for at least 8 hours you need the energy to start your day and so your body has the energy to do things that would make you feel more healthy and with energy.

Each gram of carbohydrates and proteins yield 4 calories / gram . the more the calories a food has the more energy it provide to you body.

Your answer is  d.)relationship between pressure and air volume and led to the understanding of how respiration works