Final answer:
A salute should be rendered in all of the given situations: when outdoors and uncovered, when in civilian attire, and when in a non-military setting.
Step-by-step explanation:
In the case of rendering a salute, it is appropriate in all of the given situations: when outdoors and uncovered, when in civilian attire, and when in a non-military setting. This is because rendering a salute is a sign of respect and is commonly practiced in these circumstances. For example, when outdoors and uncovered, it is customary to salute as a sign of respect for the flag or during the playing of the national anthem.