Question

study the image about geologic time. during which period did humans first appear on earth? geochronological scale cenozoic paleogene neogene quaternary o quaternary o neogene o paleogene o cenozoic

Explanation:

The image shows the geochronological scale. Humans first appeared during the Quaternary period, which is the most recent period in the Cenozoic era.

Answer:

A. Quaternary