Here's why:

* DNA polymerase is responsible for adding nucleotides to the new DNA strand, using the existing strand as a template. It essentially "reads" the template strand and adds complementary nucleotides to create a new strand.

* There are several different types of DNA polymerases in cells, each with slightly different functions, but all involved in the core process of DNA replication.

While DNA polymerase is the primary enzyme, several other enzymes are also crucial for DNA replication:

* Helicase: Unwinds the double helix to expose the template strands.

* Primase: Creates short RNA primers to initiate DNA synthesis.

* Ligase: Joins the Okazaki fragments (short pieces of DNA synthesized on the lagging strand) together.

* Topoisomerase: Prevents the DNA from becoming tangled during unwinding.

So, although DNA polymerase is the key player, it doesn't act alone. DNA replication requires a complex interplay of many enzymes and proteins to ensure accurate and efficient duplication of the genetic material.