The first people to establish a civilization in the mesoamerica are believed to have been 1) Aztecs 2) Olmec 3) Iroquois 4) maya

The first people to establish a civilization in the mesoamerica are believed to have been 2) Olmec

Explanation:

It was during the 1200BC that the "first civilization" in the "central" and "North America". It was in the "coastal regions" of the southern part of the "Gulf of Mexican". The first civilization was the Olmec civilization. Their settlement area was at San Lorenzo. The Olmec people had their own traditional sculptures and of temple architecture. The structures are quite astonishing. They are massive stone heads; they have a height of two metres, square jawed warriors wearing helmets with ear flaps.