Why can’t i cry if i feel very sad?

Some people cry more easily than others, and that's normal. People are different, so it stands to reason that emotional expression varies from person to person. If you can't cry at all, you might have a hard time working through your own emotions, and you could also find it tough to connect with others.

The answer is either 3 or 4

Dbecause it isn't always an athlete, breathing techniques don't have to be advanced, and consistent intensity won't make it go down or stay the same