What happens to the respiratory system as it ages?

As you age, changes affect your lung tissue, muscles and bones, which all impact your breathing. The maximum amount of air your lungs can hold—your total lung capacity—is about six liters. ... After about 35, their function declines as you age and as a result, breathing can slowly become more difficult over time.

what are your'e options?

the correct answer is 4 (giveaways to the public)

something that is given away or gave out for free. an occasion at which things are given away to free. something that is evident or obvious; something that uncovers a mystery.

it could be be in a form of a lucky draw as well. these the company events gather more audience for their pr and it also increases their ratings as well. this is a way to attract more customers towards themselves.