Please choose the correct ending to complete the given sentence: Health: [header] How to cope with claustrophobia [title] Breathe. [step] Anytime you find yourself becoming anxious, the first step is to breathe. Deep breathing activates your body's relaxation response, which makes it a powerful anti-anxiety tool.

Ending1: Whenever you experience a claustrophobic response, use deep breaths to slow your thoughts and reduce feelings of panic. [substeps] Inhale to a count of 4. Ending2: Exercising to regulate your heart rate and breathing reduces anxiety and instantly calms you. [substeps] Imagine that you are explaining this concept to a child. Ending3: Sit up straight in a comfortable position, taking in the present moment. [substeps] A small inhalation is always okay. Ending4: [substeps] Contract your muscles and breathe in deeply. Relax your body, then inhale through your nose for two seconds.

Answer format: ending1/ending2/ending3/ending4