Answer: synthesis
Step-by-step explanation:
1. Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution.
Example:
2. Synthesis reaction is a chemical reaction in which two reactants are combining to form one product.
Example:
3. Double displacement reaction is one in which exchange of ions take place.
Example:
4. Decomposition is a type of chemical reaction in which one reactant gives two or more than two products.
Example: