Which of the following is an example of offensive Electronic Attack?

Using jammers to prevent enemy radar operation is an example of offensive Electronic Attack because it directly disrupts or damages the enemy's ability to detect and respond to friendly forces. The primary aim of this action is to deny the enemy the use of their radar systems, which are crucial for surveillance, targeting, and situational awareness. This offensive action seeks to create an advantage by impairing the enemy’s operational capabilities, thus facilitating friendly operations.

In contrast, employing frequency agility to enhance communication focuses on improving one's own communications rather than attacking or degrading enemy capabilities. Implementing measures for self-protection against attacks is defensive in nature, designed to safeguard assets rather than offensively targeting an enemy system. Tracking enemy electromagnetic energy is more about intelligence gathering and future operations planning; it does not actively disrupt or impair enemy systems and therefore does not classify as an offensive action.