Who typically provides naval messages associated with OPTASK AMPHIB?

The correct answer identifies that the PHIBRON (Amphibious Squadron) and ARG (Amphibious Ready Group) are typically responsible for providing naval messages associated with OPTASK AMPHIB. This is because these units are directly involved in amphibious operations and exercises, and they play a critical role in the coordination and communication necessary for effective amphibious warfare.

The PHIBRON and ARG are specifically structured and trained to operate together and support amphibious assaults, logistics, and force integration. Their messages will include operational tasking, situational awareness information, and logistics updates pertinent to amphibious operations, ensuring that all participating forces are aligned and informed.

Though other options mentioned may have responsibilities related to naval operations, they do not specifically focus on the kind of amphibious operations and related communication that the PHIBRON and ARG do. This distinction emphasizes the specialized role of these units in the amphibious warfare context.