Final answer:
La Venta is the site associated with the Olmecs. It was the capital city of the Olmec civilization and had a population of up to eighteen thousand people.
Step-by-step explanation:
The site associated with the Olmecs is La Venta. La Venta was the capital city of the Olmec civilization and was built around 1200 BCE. It was a major urban complex that covered almost five hundred acres and had a population of up to eighteen thousand people. La Venta is known for its large earthen mounds, plazas, tombs, and stone heads and sculptures.