What is the rpocess in which most animals make diploid zygotes?

Most animals make diploid zygotes through the process of sexual reproduction, which involves the fusion of two haploid gametes: the sperm from the male and the egg from the female. During fertilization, these gametes combine their genetic material, resulting in a diploid zygote with a complete set of chromosomes. This zygote then undergoes cell division and development to form a new organism.