1. establishment of the ics modular organization is the responsibility of the:

The establishment of the ICS modular organization is the responsibility of the incident commander.

Explanation:

The modular organization of the SCI is based on the type, magnitude, and complexity of the incident, its expansion occurring from the bottom up as resources are assigned in the scene, and set from top to bottom, according to the particular needs by the commander of the incident. This principle allows the working positions to be added (expansion) or withdrawn (contraction) with ease.

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