Which of the following objectives can be accomplished by using mobility in military engineering?

Using mobility in military engineering primarily involves leveraging the ability to move forces and resources efficiently and effectively across various terrains. This is crucial in limiting enemy options, as it allows for rapid positioning and repositioning of troops, equipment, and supplies. By enhancing mobility, military forces can conduct maneuvers that restrict the enemy's ability to move freely, making it difficult for them to launch attacks or respond to threats adequately.

For example, an agile force can quickly surround or outflank enemy positions, cutting off routes of retreat or resupply. This tactical advantage can compel the enemy to alter their plans or positions, thereby limiting their strategic options and overall effectiveness in the battlefield.

The other choices focus on aspects of military engineering that do not directly relate to mobility. For instance, enhancing ground mobility refers to improving the ability to move across terrain but does not specifically relate to limiting enemy options. Creating barriers is more about defensive strategies and fortification, while establishing permanent fortifications deals with constructing long-term defensive structures rather than the dynamic movement inherent in mobility tactics. Thus, the focus on how mobility allows forces to strategically limit enemy actions makes it the correct choice here.