What is the process called that the ecosystem would undergo in order to restore itself?

c is the answer to this question. altitude affects the weather because air molecules evaporate.

actually the answer is c

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).

that's all i luck!