Which three types of reactions yield a product that is a chemically bonded combination of reactants?

Synthesis reactions combine reactants into a product, and polymerization joins many small molecules into a larger chemically bonded molecule. Oxidation can also produce a compound by chemically combining a substance with oxygen. Decomposition is the opposite process—it breaks a compound into simpler substances—so choices containing decomposition do not fit.

AI-written and checked against the verified answer.