Question to do with phospholipids and triglycerides?

Ok so I have a question to answer but I've not really been taught the topic on it, it's a merit question so we barely get any help on it even if I asked I would be given very little to go off and I'm not that good at chemistry

The question is as follows:

"Fatty acids and glycerol can be described as monomers of triglycerides and phospholipids. Describe how structural diversity between different examples of triglyceride and phospholipids can arise from a relatively limited number of monomer units"

Do you know the structures of fatty acids, glycerol, triglycerides and phospholipids?