which best describes eras and periods?\neras have a smaller time span than periods.\neras and periods are…

which best describes eras and periods?\neras have a smaller time span than periods.\neras and periods are independent of each other.\neras and periods both appear at the start of the cambrian period.\neras were more recently established on the time scale than periods.

which best describes eras and periods?\neras have a smaller time span than periods.\neras and periods are independent of each other.\neras and periods both appear at the start of the cambrian period.\neras were more recently established on the time scale than periods.

Answer

Brief Explanations:

In the geological time - scale, eras are larger units of time compared to periods. Eras are composed of one or more periods. They are not independent as periods are part of eras. The Cambrian period is just one of many periods within an era. Eras have been established for a long time and there is no truth to the claim that they were more recently established than periods.

Answer:

None of the above options are correct.