If an unresponsive male found in the snow shows no breathing or pulse, what should you do next?

In a scenario where an unresponsive individual is found without breathing or a pulse, beginning chest compressions is the most critical and immediate action to take. This approach is rooted in the understanding that high-quality chest compressions are essential in maintaining blood circulation and oxygen delivery to vital organs during a cardiac emergency.

The primary goal in this context is to provide adequate circulation to prevent brain damage and other organ failures that can occur within minutes due to lack of oxygen. Chest compressions generate artificial circulation in the body, which can help sustain the patient's life until advanced medical care is available.

Initiating chest compressions right away is aligned with the latest guidelines for cardiopulmonary resuscitation (CPR), which emphasize the importance of early intervention. The other options, while relevant in certain contexts, do not address the immediate need for circulation in a patient who shows no signs of life. Waiting or assessing for an additional period would delay critical care, while ventilating or attaching an AED should generally follow the initiation of compressions. Thus, beginning chest compressions immediately is the correct and life-saving step in this emergency situation.