Option 'B' = changes in climate, had the greatest impact on pre-historic man.
Changes on the weather forced men to move periodically or cyclically, usually returning to their original location at various times. When they moved to colder climates, they would make clothing out of animal skins, to protect themselves. When the nomads learned how to plant, they didn't need to search for other places anymore.
Answer: 1) What two countries were already involved in a military conflict before the beginning of World War II? 2) What was the longest battle of World War II? 3) What was the first Nazi concentration camp? 4) In which battle did the Axis powers lose about a quarter of their total troops on the Eastern Front?
Answer:
The Emancipation Proclamation led the way to total abolition of slavery in the United States. With the Emancipation Proclamation, the aim of the war changed to include the freeing of slaves in addition to preserving the Union.
Explanation: