Which condition would most likely result in evolution

You didn't give examples, so here is one!

If it became extremely cold, an animal might gain thicker blood or longer fur to keep them warm.

possible answers would be climate change, introduction of a predator, and changes in available resources. Hope this helped..

Explanation:

If this was a multiple choice question, next time please include the possible choices for a more accurate answer.

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).