Green box on PCB schematic
The green box is just to draw attention to that block of circuitry or indicate visually that those parts are related to each other in some way.
The voltage divider is required to meet the absolute maximum VBUS voltage specification if Vdd or REGIN may be unpowered when VBUS has 5V on it, as explained in the datasheet:

The green plus the (NC) beside the 10K resistor may indicate that it is not normally installed (though that is not one of the several usual ways of indicating that fact). It may not be necessary- the SUSPEND and /SUSPEND pins are outputs and are not used on the section of the schematic that you have provided for us, however the net label &quot;ACTIVE&quot; implies that it might be used somewhere else on the full schematic.