The use of uncle sam to represent the us is often use in political cartoons this is an example of which technique

The use of Uncle Sam to represent the US is often used in political cartoons is an example of symbolism.

Explanation:

Symbolism is a technique that uses symbols to give symbolic meanings to ideas.  

Uncle Sam is a popular symbol for the US; It was purposefully designed to interpreting and framing political discourse and national identity.  Uncle Sam is a very influential and iconic symbol of America, it is used to represent the American nation in foreign press; it was also present in War recruiting posters. In all, is a familiar symbol of patriotism and government of the US.  

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44