Which of these is an agent of solution? O A. High pressures
O B. Rock pieces
O c. Plant roots
O D. Acid rain

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).

d.embryo is the correct one

answercoenzymes;