Question

Why are human beings who look so different from each other in terms of size,colour and looks said to belong to the same species?

Answer 1

If human beings look different in terms of size, color and shape then it doesn't mean they are different species.

Species is the group of organisms that can produce fertile offspring by doing the interbreeding.

The features in the human species may vary based on their genetic nature, but everyone belongs to the same species.

Answer 2

$pecies =>> The members of only same $pecies can breed with other and give birth to young ones.
Characteristics like size, colour and looks is based on the genetic material present in the organism.