The best way to maintain a healthy weight is to

The important point to have and maintain a healthy weight is to exercise regularly and have good eating habits

Explanation:

Exercising regularly and eating healthy does not require much effort. One type of exercise is instead of using public transportation, going for a walk or using a bicycle. If you live in a building, go up the stairs instead of the elevator. Do a cardio activity, which allows to accelerate the heart and breathing.

With regard to healthy eating, a very varied diet should be maintained and followed, selecting foods that should be consumed daily, such as fruit juices, or include five servings of fruit per day, including whole grains and lean proteins in each meal.

answer; i believe that the correct answer is (b) is a factor associated with physical activity and heart disease;

                                                        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.