Question

which geological time division was characterized by the cambrian explosion, which marks a rapid diversification of various animal groups?
a paleozoic era
b mesozoic era
c precambrian eon
d cenozoic era

Explanation:

The Cambrian explosion occurred during the Paleozoic era. This era is known for significant evolutionary developments, including the rapid diversification of animal groups as seen in the Cambrian explosion. The Mesozoic era is the "Age of Dinosaurs", the Precambrian eon predates the Cambrian period (which is part of the Paleozoic era), and the Cenozoic era is the "Age of Mammals".

Answer:

A. Paleozoic era