Which of the following contributed most to early people's ability to produce food?
a. hunting of wild herds
c. the ability to make fire
b. the end of the ice age
d. metal tools

The end of the ice age

Explanation:

A the end of this age it became a warmer climate so, they could do things easily without freezing.

americans had many intangible advantages. well since the british fought a war far from home military orders, troops, and supplies sometimes took months to reach their destinations, and the british had an extremely difficult objective. they had to persuade the americans to give up their claims of independence, americans had a grand cause: fighting for their rights, their independence and their liberty. this cause is much more just than waging a war to deny independence.

christopher columbus (1492–1504)