Synthesis is a mixture, or a result that comes from adding things together. Add salt to water, and the synthesis is salt water. Mix flour, sugar, butter, and eggs together and bake them, and the synthesis is a cake.
When you start with a simple idea and add to it until the elements come together to form a complex system, that’s synthesis. A musician starts with one note, adding other notes to it until it synthesizes or comes together, into a song. Combine two simple chemicals, like oxygen and hydrogen to create a chemical compound (water), and that’s synthesis too.
