Answer:
Step-by-step explanation:
The Olmecs was the first civilization in Mesoamerica dating back to 1500BC. Many of its inventions were passed onto later civilizations in Americas like the Mayans and Aztecs. Among them were their calendar and concept of zero in counting.
Its artworks were another notable contribution. The most striking artifacts found were "colossal heads" which were giant stone sculptures weighing over 25 tones.