Final answer:
Area fire and precision fire are not types of adjustment. They are terms used in the context of military operations to describe different methods of firing artillery or weapons.
Step-by-step explanation:
The statement that area fire or precision fire may be employed is false. It is not accurate to classify area fire or precision fire as types of adjustment. Instead, they are terms used in the context of military operations to describe different methods of firing artillery or weapons. Area fire refers to firing at a general area without precise targeting, while precision fire involves aiming at specific targets with accuracy.