Final answer:
Astronomy was an important science to the Mayan, Aztec, and Incan cultures, as evidenced by the Mayan calendar and the astronomical knowledge inscribed in Maya codices. (option d)
Step-by-step explanation:
The science that seems to have been important to people in all three of the Mayan, Aztec, and Incan cultures is astronomy. These ancient civilizations showed remarkable understanding in this field, which is evident through their intricate calendars and astronomical observations. The Mayan culture, for instance, created a sophisticated calendar based on the planet Venus, and their expertise in astrological events is well-documented in Maya codices that provide astronomical tables and calendrical calculations. The Aztecs and Incas also had strong astronomical practices, which were often intertwined with their religion and civic planning.
Astronomy's consistent importance across the Mayan, Aztec, and Incan cultures underscores its universal significance in shaping their calendars, religious beliefs, and practical activities, showcasing the cultural and scientific convergence in these ancient civilizations.