The letter in the figure that represents fertilization is B.
What is fertilization?
Fertilization is a biological process in which a male gamete fuses with a female gamete to produce a zygote.
Gametes are usually haploid (n). Thus, a haploid sperm (n) fusing with a haploid egg (n) will produce a diploid zygote (2n) just as it appears in B.
More on fertilization can be found here: https://brainly.com/question/3204813
