B. Hypothesize how small changes in energy use can make a significant difference in CO, emissions.

small changes of energy can create such a big difference in co emissions. As we use less energy the amount of harmful gases that are produced from them will lower, therefore creating a smaller amount of greenhouse gases/ CO into the atmosphere.

the answer is "a.) well–developed vascular system."

explanation:

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.