5. You go to the science museum with your teacher to look for an idea for a science fair exhibit. You look at the following display about fossils from Precambrian and Cambrian rock strata. The sign on the exhibit says the following:
• Rock strata from the late Precambrian Era provide evidence of only a small number of different kinds of animals.
• Rock strata from the early Cambrian Period provide evidence of a huge number of different kinds of animal life.

Which of the following is the BEST description for what occurred during the early Cambrian Period?

Look at the picture at the possible answers are in it.