Age, as you grow older (50+) you tend to shrink in height an inch or two. This is because calcium tends to be leached from your bones.
No, gaining muscle does not make you shorter.
No, going to the gym does not make you shorter.
No, carrying heavy things does not make you shorter.
No, lifting weights does not have the potential to make you shorter.
Ways that make you appear shorter is slouching, slouching will make you appear shorter so if you stand straiter you will appear taller
No. Foods or drinks don't make people shorter.
No. Just because they are called shorts doesn't mean they make you shorter.
hairstyle cannot make your nose look shorter
no
To make your chain shorter, you can remove links or adjust the clasp to create a tighter fit.
Weight Lifting
The wavelength gets shorter.