The right answer is All answer options describe plasmids.
A plasmid is a natural or artificially modified circular DNA molecule for use in biological research.
The researchers use the plasmids to insert a DNA fragment of interest, thanks to the cloning cassettes. They can clone genes to express proteins or RNAs and analyze them.
The temperature surrounding the victims body that is colder than normal body temperature will speed up the rate of cooling.
Location 2 is cooler than Location 3 and Location 1 because it's at a higher altitude