Which signs indicate that a person is alive?

The most comprehensive indication that a person is alive includes several observable signs, which is why the correct answer encompasses all listed choices.

When assessing signs of life, breathing is a primary and critical indicator. A person who is breathing is showing essential life functions, as breathing supplies oxygen to the body and is vital for survival. In addition to breathing, movement is another key sign of life; it can range from voluntary actions to involuntary responses.

Color can also provide clues about a person's health status, as healthy skin color typically indicates adequate oxygenation and blood flow. An absence of breathing and movement, especially when paired with abnormal skin color, can often signal life-threatening conditions.

Bleeding can be misleading; while it may indicate physical trauma, it does not directly signify life or death on its own. However, the presence of these signs—breathing, movement, and normal skin color—combined provide a more complete picture of an individual's vitality. Thus, the answer that encompasses all these considerations accurately reflects the signs indicating that a person is alive.