PLEASE HELPPP Which scenario would most likely result in genetic drift?

A gardener plants only the seeds from last year's largest vegetables.
A hurricane cuts off a small section of beach from the mainland, dividing a population of sand fleas.
Individual bacteria not killed by a given antibiotic produce offspring that are also unaffected by the same.
Noise pollution prevents female frogs from hearing males with higher-pitched voices, but not males with lower-pitched voices.

Taq polymerase is an enzyme isolated from the organism thermophilus aquaticus. this organism has been found living in the hot springs of yellowstone national park. this enzyme is used to copy human dna from crime scenes. most reactions are performed at ranges similar to those of the human body; however, what considerations should be made for optimum use of this enzyme? view available hint(s)taq polymerase is an enzyme isolated from the organism thermophilus aquaticus. this organism has been found living in the hot springs of yellowstone national park. this enzyme is used to copy human dna from crime scenes. most reactions are performed at ranges similar to those of the human body; however, what considerations should be made for optimum use of this enzyme? the enzyme will not work on human dna.nothing should be altered.the ph should be decreased.the temperature should be raised.