* Semi-conservative replication means that each new DNA molecule consists of one original strand and one newly synthesized strand. This is how DNA maintains its sequence and ensures accurate copying.

Let's break down why the other options are incorrect:

* Conservative replication: This would mean the original DNA molecule remains intact, and a completely new molecule is created. This isn't how DNA replicates.

* Dispersive replication: This would mean that the original DNA molecule is fragmented, and the new molecule is made up of pieces of both original strands. This is also not how DNA replicates.

In summary:

DNA replication is a complex process, but it's essential for cell division and the transfer of genetic information. The semi-conservative model accurately describes how DNA replicates, ensuring the fidelity of genetic material.