Jacob wants to improve his physical appearance before the homecoming dance, but he has trouble finding time to exercise. one of his friends has been taking diet pills that really seem to work. jacob isn't sure whether he should try those, as well. which person should jacob ask for advice?

His primary physician would be the most logical explanation. As your doctor is able to assist in these areas of nutrition and over all health of the body.

Some answers could also include dietician or physical trainer.

answer; i believe the correct answer is (progesterone);

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.