Briefly explain why unsaturated fats are liquid at room temperature and saturated fats are solid at room temperature

Unsaturated fats have one or more double bonds inside their fatty acid chains. The two carbons on the hydrocarbon molecules each have triple or double bonds, and hydrogens cannot saturate them. ... On the other hand, saturated fats do not have these double bonds in their fatty acid chains and are solid

the answer is:

carbon dioxide