Answer:
B. Geological Events and Lifeforms
Explanation:
The Earth's Geological time scale is mostly based on Geological Events and Lifeforms.
The Geological time scale provides a division of events on the earth into several time frames.
Each of the time units are based on events through the Earth's history and evolution of life.
The events are often recorded in rock strata and also as fossils which are the preserved remains of organisms.
