Why was it difficult for early humans to cultivate land prior to the end of the last ice age?

The correct answer to this open question is the following.

It was difficult for early humans to cultivate land before the end of the last ice age because the weather conditions were not favorable for growing crops, the soil of the earth was not ready for agriculture, and the knowledge of early humans about agriculture techniques were minimum. The soil was cold, without the proper nutrients to be cultivated and used to produce crops. That is why early humans were hunter-gatherers that followed herds to hunt them and feed their families. Humans started to learn agriculture techniques during the Neolithic Revolution.

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

this means that germany had to pay the allied countries. reparations are/is essentially payment for something that they have done wrong, so after ww1, germany was forced to pay reparations so they could replenish the allied countries resources' that they had lost during the war.