There may be a shortage of clean drinking water in the future
The correct answer is option C, Conjugation
During conjugation the genetic material is transferred between two bacteria through a bridge like connection. In this was the bacteria acquires the resistance to the antibiotic methicillin
I believe your answer would be:
A. Fossils.
Explanation:
Because they are the preserved remains or traces of animals, plants, and other organisms from the past. They're also important evidence for evolution because they show that life on earth was once different from life found on earth today.
Hope I helped, good luck! =)