This question already has an answer here:

Is it possible to split polygons in a group into individual polygons?

Let's say I have 5 red individual polygons that is seen as 1 polygon as they are all grouped together, is there a way of splitting them so that the layer contains 5 separate polygons that is nolonger interconnected in ModelBuilder using ArcGIS Desktop?

marked as duplicate by PolyGeo Jan 8 at 6:15

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.