Which of the following is a type of reconnaissance patrol?

A route patrol is a type of reconnaissance patrol specifically focused on gathering information about the terrain, potential enemy movement, or the condition of routes. This type of patrol helps assess routes for future troop movements, supplies, or potential ambush sites, allowing commanders to make informed decisions based on the gathered intelligence. Route patrols often involve observing key points along the path, reporting on changes in the environment, and identifying potential hazards.

In contrast, a contact patrol is primarily designed to make contact with the enemy or to determine the enemy's strength and intentions. An ambush patrol is aimed at setting up a surprise attack on an enemy force, and a security patrol provides protection to a unit by securing its flanks and rear. While these other types of patrols may include some elements of reconnaissance, they each serve different primary purposes that distinguish them from route patrols.