What is the function of a parachute flare?

A parachute flare serves a critical function in distress signaling by firing into the air and deploying a parachute, which allows it to descend slowly while illuminating the area with bright, visible light. This visual signal is designed specifically to attract attention from nearby vessels, aircraft, or people who may be able to provide assistance. The high visibility of the flare at night or in low-visibility conditions makes it an effective tool for emergency situations.

The other options do not accurately describe the purpose of a parachute flare. For example, while some flares may emit light, they are not intended simply to scare away wildlife, indicate good visibility, or mark fishing areas. Each of those activities would require different types of signals or tools that have distinct functionalities unrelated to distress signaling.