Which method can improve visibility in a survival situation?

Employing reflective materials or bright colors is a highly effective method for improving visibility in a survival situation. When lost at sea or in a remote area, being more visible to rescuers can significantly increase the chances of being spotted. Reflective materials can bounce sunlight or other light sources effectively, making them stand out from their surroundings. Bright colors, such as orange or yellow, can be easily seen against most natural backgrounds, especially when viewed from a distance.

Using reflective materials or bright colors can make it easier for search and rescue teams to locate individuals, especially from the air or at a significant distance. This tactic not only aids in visibility during the daytime but also enhances recognition in low-light conditions, as reflective surfaces can catch light from boats or aircraft.

In contrast, while other methods like building a large fire can produce smoke and flames which may attract attention, they do not guarantee visibility in the same way as bright, reflective materials do. Climbing a tree, although potentially useful for scouting, does not enhance the visibility of a person on the ground. Lastly, using natural materials might help with camouflage rather than visibility, making it less effective in a scenario where being seen is crucial for survival.