All food preservation methods a. slow down or stop growth and reproduction of microorganisms b. involve removing liquid from the food
c. create an acidic environment for the food product
d. require the food to be heated before it can be preserved

the last one: artificial selection/genetic engineering

plant breeding is modifying the genetic composition of the plant - but this isn't cloning (which is specifically introducing a gene into a genome). but you are artificially selecting for the phenotype that you want.

the second one is literally genetic engineering - the gene would have been cloned first and then inserted or genetically engineered into the new plant cell (the cotton).

i guess because there isn't enough love going around. < 3