What measures may be included in the support by fire position?

The choice that includes "Direct fires on objectives being assaulted" is the most relevant to the measures included in a support by fire position. This position is specifically designed to provide fire support to troops who are actively engaged in an assault. In this context, direct fire entails engaging enemy forces or obstacles that directly threaten the objectives being targeted by friendly forces.

When troops are assaulting a specific objective, having a dedicated support by fire position allows for concentrated firepower to suppress, neutralize, or destroy enemy combatants or defenses, facilitating a smoother and more effective assault. This kind of tactical approach not only enhances the chances of mission success but also helps protect advancing troops by reducing the immediate threat they face during their operation.

The other options pertain to different aspects of military operations but do not specifically characterize the role of a support by fire position in the assault context. Defensive positions for ground troops focus more on protecting them during a defensive action, while establishing air patrols involves aerial support that is not confined to ground fire support. Lastly, providing logistical support complements operational capabilities but does not directly involve the type of fire engagement a support by fire position encompasses.