Plz
why is it thought that the olmecs from central mexico came originally came from elsewhere?
a. because of facial characteristics found on large stone heads
b. because all cultures were settled by nomadic tribes
c. because the rubber used in their culture came from the philippines
d. because the jade-work they made has detail linking them to egypt

a--because of facial characteristics found on large stone heads

Explanation:

Even though the exact origin of the Olmec civilization still remains controversial, anthropologists point out to striking resemblance of the facial features found on huge monolithic heads to Africans.

Moreover, such theory is supported by the argument that some cultural traits found in Olmec civilization closely resemble characteristics of the Egypto-Nubian world of the same time period.

However, despite various theories speculating on the African, Chinese or even Nordic origins of the Olmec, there is no general scientific consensus regarding the issue due to the lack of sufficient evidence that would support such theories

before there were tanks, machine guns, windmills, and solar panels, the first civilizations emerged that create the history of humanity which provided the larger context for western civilization. uses of weaponry and technology were used very differently in the ancient civilizations than they are today. relating back to the times of the ancient mesopotamian civilization, technology kept advancing throughout the ancient egyptian civilization into the ancient greek civilization, and then finally the ancient roman civilization. as techniques and strategies were past down from civilization to civilization, each shared its own similarities, as well as varied differences. one trait they had in common was to commit violence and economically overpower one another. technology has ultimately advanced due to the knowledge transferred from generation to generation. uses of sophisticated weaponry and devices have created more opportunity for warfare and improvement in the work place. ancient civilizations became more powerful due to the advancements of technology. technology did not only create the use of violence, but it also the economies grow and become stronger, because production of trading goods rose like never before. the rivers, such as the nile, tigris, and euphrates all flourished, as well as destructed civilizations. each civilization had different uses for these rivers, however, some benefited more than others. when analyzing ancient civilizations, there   are things you must understand

explanation:

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