Rein tentatively answered, "Lord Trevo, is it prediction?"
Trevo looked at Rein with an appreciative gaze and said, "Lord Rein, your wisdom is truly breathtaking."
"You know, when my archery teacher once asked me this question, I pondered over it for a long time and answered incorrectly several times before figuring it out. I didn't expect you to get it right on your first try."
"It is prediction!"
"Unlike shooting a stationary object, hitting a moving target at a distance requires predicting its direction and speed in advance. The greater the distance, the more crucial the prediction is."
Rein nodded; he understood this point, having heard the saying 'A miss by an inch could lead to a failure of a thousand miles' in his former life.
If the prediction is wrong from the start, the arrow will deviate slightly at the beginning, and as it travels farther, the deviation could eventually be measured in meters, or even tens of meters.