Answer: Synthesis
Explanation:
The formation of complex molecules from the simpler molecules via reaction is known as synthesis. This takes place either in laboratory conditions. In natural conditions it takes place in the body of the organisms.
The monomers combine to form polymer. The simpler molecules like amino acids combine together to form a complex molecule known as protein.
Synthesis of glucose from carbohydrates and water is an example of formation of complex compounds using simpler compounds.
