Which of the following was an important development during the paleolithic period? a. the first civilizations appeared during the paleolithic period. b. humankind became food producers rather than collectors. c. humankind developed iron-working technologies. d. humankind spread to inhabit all parts of the globe.

D. Humankind spread to inhabit all parts of the globe.

Explanation:

Paleolithic humans were nomads, so they moved from place to place when they were running out of food. This led to a big spread of humankind from Africa to Eurasia, the Southeast region of Asia, and Australia. Afterward, they started inhabiting Europe to finally reach America from North to South.

the correct answer is ) possibility.

demonstrating opportunity cost is done through production possibility.

the opportunity cost can be demonstrated using the production possibility frontier or curve. this graphic shows the total number of possibilities for two products when we have the resources needed and used in an efficient manner. the main resources could be money, labor, and technology. the curve shows that the production of one good increases when the production of the othe

an aneroid barometer is different from a mercury barometer in that it provides readings that increase as air pressure increases.

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