is a technique used with persons with panic disorder that aims at restoring a normal level of carbon dioxide in the blood by having clients .

Breathing retraining is a technique used with persons with panic disorder that aims at restoring a normal level of carbon dioxide in the blood by having clients inhale slowly and profoundly from the abdomen, maintaining a strategic distance from the shallow, quick breathing

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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the correct answer is 2 and 4