Final answer:
Lard, tallow, and butter are three solid oils of animal origin, all of which are triacylglycerols that are solid at room temperature and used widely in cooking and baking.
Step-by-step explanation:
Three examples of solid oils, which are of animal origin, include lard, tallow, and butter. These are animal fats that, according to their chemical structure, are considered triacylglycerols or triglycerides due to their composition of three fatty acid units attached to glycerol. These fats solidify at room temperature (25 °C) reflecting their saturation and the length of the carbon chains in their molecules. They are widely used in cooking, and in the case of butter, as a spread, or in baking as well.