What hazard is particularly difficult to see when flying toward a setting sun?

When flying toward a setting sun, visibility can be significantly impaired due to the glare and reduced contrast in the environment. This phenomenon can make it particularly challenging for pilots to detect various hazards, including low-flying birds, other aircraft, and electrical wires.

The glare from the sun can wash out visual cues, making other aircraft difficult to see against the bright backdrop of the sun. Similarly, low-flying birds may blend into the sky or become obscured by the intense lighting conditions, posing a collision risk. Electrical wires are often thin and can be hard to spot, especially when illuminated at odd angles by the setting sun.

Given the challenges associated with reduced visibility in these circumstances, it is crucial for pilots to remain vigilant and employ additional safety measures, such as using careful scanning techniques and maintaining a heightened awareness of their surroundings. Therefore, the combination of these hazards being particularly difficult to see when flying into the setting sun justifies selecting the option that includes all of them.