Answer:
Option: There are fossils of animals in geological strata that are older than the Cambrian.
Step-by-step explanation:
The Cambrian Period regards an essential part of life on Earth. It is the period when most of the animals first emerge in the fossil history. This event is called the Cambrian explosion. According to scientists, the Cambrian period began after the sudden increase of oxygen that led to the evolution. Insects, spiders, and crustaceans and brachiopods were some of the species that emerged.