Question

what was the impact of the change in environment around 12000 years ago

Answer 1

many things were changed the air was fresh
all the peoples were not greedy
people's were sharing
find food with friends
and so on

hope it will help u

Answer 2

changes of the environment brought impacted every aspect of life. it brought changes to fitness, reproductive success of the individuals and  survival of species and ecosystems. there was habitat destruction for many organisms, changes in a parasitic loads and diseases, food chain was destructed, increase in population, the climate change was also affected both directly and indirectly by change in the environment.