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The first step in the formation of the human embrayo and it is called fertilization.

What is fertilization?

The first step in the formation of a human embrayo is called fertilization. The term fertilization has to do with fusion of the male and female gametes to form a zygote.

Hence, the diagram as shown is the first step in the formation of the human embrayo and it is called fertilization.

Learn more about fertilization: https://brainly.com/question/17991559