Which option most accurately summarizes the article without judgment

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).

for a different answer set the answer would be because the oxygen in the water had depleted (apex)

the circumference of the solar disc is 4375246 km, nearly.

explanation: