Please choose the correct ending to complete the given sentence: Health: [header] How to survive after a shipwreck [title] Stay calm. [step] Perhaps the most important thing to surviving a shipwreck is staying calm. This is even more important in the first chaotic moments in a tragedy at sea.

Ending1: If you don't stay calm, you could put yourself in more risk. [substeps] If you find yourself panicking, tell yourself to relax and breathe deeply. Ending2: When you're worried, terrified, angry, sad, or annoyed, your breathing slows immediately before you dive in. If you're worried, panic, your heart rate increases rapidly and perspiration droplets form on the surface of the water. Ending3: Think as firmly as possible about yourself and what you hope to gain from the loss. [substeps] Figure out what is the worst thing that can happen. Ending4: Panic is one of the main reason ship captains leave bodies of water. If you experience extreme emotion, do what you can to call yourself strong.

Answer format: ending1/ending2/ending3/ending4