Which of the following defines the concept of an operation? It includes the specific missions to be accomplished by each subordinate element. It is how the leader visualizes the execution of the operation from start to completion. It is a vision provided to Marines that enables them to act in a changing environment without subsequent orders. It includes specific instructions and tasks to subordinate units that tie the plan together.Consideration of the weather's effects is an essential part of the situation. The leader determines how the weather will affect visibility, mobility, and survivability of ____________. Both friendly and enemy units Friendly units only Enemy units only Civilians only