What else would aid in understanding this bar graph? A) label the x and y axis B) provide more numbers C) provide more colors D) add pictures

c. heat from the poles back down towards the equator.

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).