The correct answer is:
b. Meiosis allows alleles to separate, increasing the variety of colors of the offspring.
Meiosis is the process of cell division that produces gametes (sperm and egg cells) with half the number of chromosomes. During meiosis, the alleles for different traits are separated, which leads to genetic variation in the offspring when these gametes combine during fertilization. This variation can result in a range of phenotypes, including different flower colors.