What is one of the reasons for marking a minefield?

Marking a minefield serves several crucial purposes, with indicating the location of the barrier being a primary reason. When a minefield is properly marked, it helps friendly forces understand where the hazard lies, thus ensuring safe passage and minimizing the risk of accidental detonation of mines. It's essential for operational security as it provides clear guidance to those aware of the marking system while allowing for tactical maneuvering around the danger zone.

The other options may relate to tactics, but they do not directly address the primary purpose of minefield marking. Ensuring enemy troops avoid it is more about deterrence; distracting or confusing enemy and friendly forces does not align with the key intent of minefield marking, which is safety and situational awareness.