The process of sexual reproduction in animals involves

Sexual reproduction in animals involves the production of haploid gametes from diploid germ cells through the process of meiosis.

These haploid male and female gametes then fuse during fertilization to form a diploid zygote, which subsequently develops into a new organism.

Therefore, the process essentially involves both meiosis and the fusion of gametes to form a diploid zygote.

Answer: meiosis and fusion gametes to form diploid zygote