Step-by-step explanation:
The polymerase chain reaction is a molecular technique used to amplify DNA sequences. The method uses short DNA sequences called primers to select the part of the genome to amplify.
Now, the heat-stability makes Taq DNA polymerase ideal for PCR. In fact, DNA polymerase is very heat-stable and is most active around 70°C.
Thus we can conclude that the correct answer is:
Answer:
DNA polymerase