Final answer:
Olmec leaders constructed a ceremonial project on an island in a coastal swamp at a site called La Venta, which was the center of Olmec culture and featured advanced architectural and monumental structures.
Step-by-step explanation:
Olmec leaders coordinated the construction of a ceremonial project on an island in a coastal swamp at a site called La Venta. Established around 900 BCE, La Venta was a significant ceremonial center of the Olmec civilization. It featured several large earthen mounds, plazas, sports arenas, and other monumental structures, such as altars and colossal heads carved from basalt, indicating the advanced nature of Olmec architectural and civilizational development. The complexity of La Venta, which covered nearly five hundred acres and supported a substantial population, underscores its role as the central hub of Olmec culture, religion, and governmental activities. With no known written language from the Olmec, artifacts such as glyphs and monumental sculptures provide crucial insights into this influential Mesoamerican culture.