Here's a breakdown:

* Dehydration synthesis is a chemical reaction where monomers (small molecules) are joined together to form polymers (large molecules).

* This process involves the removal of a hydrogen atom (H) from one monomer and a hydroxyl group (OH) from another monomer.

* These removed atoms combine to form a water molecule (H₂O).

This is why the process is called "dehydration" - water is removed!