Red blood cells from sickle-cell anemia patients tend to form a sickled shape under conditions of oxygen limitation. If these sickled cells were lysed, what forms of the parasite and what forms of
hemoglobin would necessarily be released?

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).