Question

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

Explanation:

The image shows a geochronological scale. Humans first appeared during the Quaternary period. The Cenozoic era is divided into Paleogene, Neogene, and Quaternary periods. The Quaternary is the most recent period and is when modern - humans evolved.

Answer:

Quaternary