Please choose the correct ending to complete the given sentence: Youth: [header] How to calm your nerves around the guy you like [title] Breathe! [step] When you feel your heart thudding faster and faster, pay attention to how you are breathing. Remember: the quicker you breathe, the less air your lungs get. That means your heart is speeding up to pump the little oxygen you have to the rest of your body.

Ending1: So make a point of taking deep breaths to calm your body and mind. [substeps] Breathe in through your nose and out through your mouth. Ending2: Think a little bit loud! [substeps] If you can go the extra mile, try screaming into a pillow, ice cream cone, or their pillow. Just quiet your mind and aim for normal breathing. Ending3: The faster it's stopped, the more oxygen it is rapidly pushing out of your body (this will cause you to feel disoriented). It's like breathing through a balloon with your nostrils open. Ending4: [substeps] You can either sing or count from five as you do your breathing. One way to do this is to breathe in through your nose.

Answer format: ending1/ending2/ending3/ending4