Which of the following is a Maya achievement?Astronomy365 day calendarWriting systemBuilding pyramids

All of the options listed are achievements of the Maya civilization.

1. Astronomy: The Maya were skilled astronomers. They used their observations of the stars, sun, and planets to create complex calendars and predict celestial events.

2. 365 day calendar: The Maya developed a sophisticated calendar system that included a 365-day solar calendar, known as the Haab', and a 260-day ritual calendar, known as the Tzolk'in. These two calendars worked together to create a 52-year cycle known as a Calendar Round.

3. Writing system: The Maya developed one of the most advanced writing systems in the ancient world. Their system of hieroglyphs, or picture symbols, was complex and highly expressive.

4. Building pyramids: The Maya were skilled architects and builders. They built large cities with complex structures, including pyramids, palaces, and temples. Some of their most famous pyramids include the Pyramid