Which of the following is NOT one of the three elements of wind effects?

The three elements of wind effects on projectiles are typically distance to target, direction of wind, and velocity of wind. When considering how wind impacts the trajectory of a projectile, these elements are crucial for making accurate adjustments for the wind's influence on bullet flight.

Distance to target is important because the farther a projectile travels, the more time it has to be influenced by wind. Similarly, the direction of wind is critical as it can push the projectile off course, and understanding which way the wind is blowing allows shooters to make necessary adjustments. Lastly, the velocity of wind plays a key role, as stronger winds exert a greater force on the projectiles than lighter winds.

In contrast, altitude of projectile is not considered one of the core elements of wind effects. While altitude can impact other aspects of ballistics, such as air density and bullet drop due to gravity, it does not directly relate to how wind influences the flight path of a projectile. Therefore, altitude is the correct response as it does not belong to the main factors that shooters must account for regarding wind.