Molecule is the smallest substance. Water is an example of a molecule, water is also known for H2O and it helps mostly any kind of organism survive.
This cake is an example of carbohydrates, I contains starch. It helps keep your energy up.
My little brothers ear wax is an example of a lipid. My brothers ear wax is composed of phospholipids and phospholipids is a function of a lipid.
These nuts are an example of protein, they help strengthen your body.
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