During which period did the most recent ice age occur?
a. ordovician and silurian
b. late neogene to quaternary
c. late proterozoic
d. pennsylvanian and permian

The most recent ice age occur on : Late neogene to quaternary
During this period, Glacier cover almost all part of the earth. This period happen around 11,000 - 12,000 years ago.

Hope this helps.

The correct answer is a. when they started making tools that will them in cultivating lands, they could raise crops and that made them attached to one place for a longer period of time. after that, they started domesticating animals and building their own permanent settlements that resemble the ones we have today.