Which of the following archery formats includes unmarked distances as part of its challenges?

Field archery is characterized by its use of unmarked distances, which means that archers must judge the distance to their targets without assistance such as distance markers. This format typically involves shooting at various targets set along a course, which replicates a natural hunting environment. The targets can be at varying distances and often include different types and sizes of targets, making this discipline unique and challenging. This emphasis on distance estimation enhances an archer's skills in range assessment, an essential skill for hunting and overall archery proficiency.

In contrast, FITA (now known as World Archery) and target archery are played at marked distances on a flat range, where pre-determined yardage is used for competition. 3D archery involves shooting at three-dimensional animal-shaped targets and may include marked lines to assist with distance judgment as well, but it typically does not have the same emphasis on unmarked distances as field archery does.