Final answer:
A species is defined by the capacity of interbreeding organisms to produce fertile offspring. Homo sapiens, all being capable of interbreeding and producing fertile children, are part of the same species, even with our global diversity.
Step-by-step explanation:
The biological definition of a species is a group of interbreeding organisms that can produce fertile offspring. Therefore, a species is characterized by the ability to reproduce with one another and results in viable young that can also reproduce. For sexually reproducing entities, a species is distinguished from other species by the fact it cannot naturally interbreed with others to produce fertile offspring.
All Homo sapiens or human beings are considered to be part of the same species as they can potentially interbreed with each other and have fertile children, but they cannot do so with members of another species. This is the case despite the vast diversity among human populations across the world.