Before the development of agriculture what was the most likely reason for groups of people to move from one place to another constantly? a. yearly floods drove people away from rivers. b. the climate in ancient times was more unpredictable. c. attacking mongols pushed people west. d. people moved as they used up local food sources.

Answer;

D. People moved as they used up local food sources

Explanation;

Agriculture and ranching were no in existence, therefore, people would quickly use up food sources.

As a result they had to follow the food. Like most large animals, humans had to be migratory because they had to follow food sources around.

Later the coming of agriculture gave humans the ability to domesticate and grow their food, which enabled people to stay in one place.

yup! you are correct it is b.

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.