What is a commonly used criteria for placing plants fungi and animals into separate kingdoms?

These living beings are described to a substantial degree by their method of sustenance. Plants are photosynthetic, growths assimilate their supplements from deteriorating natural material, and creatures ingest different living beings. 
The organisms used to be thought to be plants since they become out of the dirt and have unbending cell dividers. Presently they are set autonomously in their own particular kingdom of equivalent rank with the creatures and plants and, truth be told, are more firmly identified with creatures than to plants. Like the creatures, they have chitin in their cell dividers and store hold nourishment as glycogen.