Will markcharacteristic is shared by all arthropods? a. all arthropods have six legs b. all arthropoos live on land c. all arthropods have exoskeletons d. all arthropods are insects

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).