How did a warming climate 12,000 to 10,000 years ago impact the paleo-indians living in the americas
at the time?
a. paleo-indians lost land to rising sea levels.
b. paleo-indians faced food shortages that resulted in a lower population.
c. paleo-indians relied less on hunting big animals and more on fishing and gathering food.
d. paleo-indians went to war with each other on a large scale due to scarce water resources.

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.