Final answer:
The task, conditions, and standards of PRT activities derive from military regulations.
Step-by-step explanation:
The task, conditions, and standards of PRT activities derive from military regulations. These regulations outline the specific requirements and expectations for physical readiness testing in the military. They provide guidance on the types of tasks that need to be performed, the environmental conditions under which the activities should take place, and the standards that individuals must meet to pass the tests.