1) Which of the following is the best example of scientific model?
A) A group of zoo monkeys to represent behavior in a natural environment
B) A computer simulation of Earth’s climate changes
C) An x-ray showing multiple fracture in a bone
D) A salt-water aquarium in the home of a fish enthusiast

d. groundwater flows through the subsoil and deposits minerals.

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).