Creatures that rely on other kinds of cells, or others as a source of food and shelter and sometimes hurt creatures that use leverage, or within the cell until illness or even death.
The creature lived for others. Or another cell type as a food source and shelter. And sometimes harming the creatures or the use of cells as illness or even death.
The creatures that relies on others. Or other types of cells, residence and food sources. And sometimes hurt organisms that use or cells within the until illness or even lose a life.