A forest fire destroys an area. A small population of trees and a large population of birds are both affected. Which type of limiting factor causes this? density dependent density independent population dependent population independent

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.

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).