Identify the type of chemical reaction. H2CO3 → H2O + CO2 a. reversible
b. decomposition
c. synthesis
d. exchange

the correct answer is c   with the systems

your answer is going to be physical weathering

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).