In one form of nitrogen fixation, energy in the form of nitrogen molecules into atoms. *
splits
chemicals in water vapor
O bacteria
O lightning
O mechanical consumers

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).

answer; an inhibitory postsynaptic potential;