The diagram below represents a process leading to the formation of a human embryo
Process 1 is known as:______

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