During the eighteenth century, many scholars became interested in biological diversity, human origins, and our position within the classification of plants and animals. At that time, the most commonly accepted explanation of the origin of species was:

Origin of species.

Explanation:

Creationism is the most commonly accepted explanation of the origin of species.

Creationism is a belief that biological similarities and differences are originated at creation.It is a theory which states that nature and its various aspects such as earth, life universe and humans are all created by God.Once the characteristics are set in the Creation it could not be changed.

True to the fact it is actually false