My name is jeff and idk about the answer
That means like oxygen for like breathing in your mouth
The correct answer is : D. Pleistocene epoch
The Pleistocene epoch lasted from about 2,500,000 years ago to 11,700 years ago. In this era, a lot of repeated glaciations happened on earth, since most of Earth's geographical surface is covered in Ice.
Radiometric dating should be what they use
