Answer:
The answer to your question is: Synthesis
Explanation:
Synthesis in this reaction tow molecules combine to form a new one.
Decomposition in this reaction, one molecule decomposes to form 2 or more molecules
Single replacement one element replaces another one in a molecule.
Double replacement there is an interchange of elements between two molecules.
Combustion one molecules with carbon, reacts with oxygen to produce carbon dioxide and water.
