How does the top level of an energy pyramid compare to the bottom level of that energy pyramid?

The top level of an energy pyramid has minimum energy and the bottom level has maximum energy.

The producers that make food by the help of photosynthesis has maximum energy.

As the pyramid reaches the top the energy decreases as per the 10 per cent law. The top carnivores has the minimum energy.

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).