What innovation in medicine was developed in ancient China? the use of needles to perform surgery
the use of needles to relieve pain
the use of needles to remove blood from the body
the use of needles to deliver medicine into the body

Correct
2nd Option

Second answer is correct

Explanation:

I git it right on edg. assignment

i think they would live in caves or natural tunnels

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.