The Adélie penguins feed on krill that live on the underside of ice sheets. Which of the following would help Adélie penguins survive during the melting of Antarctic sea ice? Migrating farther into the sea
Breeding during summer months
Growing strong toe nails to grip ice
Spending more time raising their young

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).