What must be testable and falsifiable meaning it can be proved to be incorrect

its temperature is increasing. this causes molecular vibrations to increase.

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).

in tropical forests it typically is hot with a lot of rain. when what is hot, it starts to evaporate and turn into water vapor.