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

Plz ? ? 20 points for this question ! hhjc6

Even before world war ii had ended, it was apparent that the allies would not remain friends in the post-war era. explain what is meant by the term cold war. then describe how the conflict between the superpowers manifested itself in the two following regions: europe and asia.

Which of the following is not one of the five informal ways to amend the constitution? oa) state legislation ob) presidential actions oc) supreme court decisions od) political party activities