Which process or processes are responsible for the series of ice ages that occurred during the cenozoic era?

Glaciation and the Antarctic Circumpolar current

Explanation:

As the supercontinents continued to separate, cold water was easily transported around the globe through the Antarctic Circumpolar current. This assisted periodic glaciation during the Cenozoic Era, leading to a series of ice ages.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .