C!
All the Mayans, Aztecs, and Incas developed complex mathematical and calendars systems.
A tax levied on every adult, without reference to income or resources. (Can I have brainliest pls lol)
The science of ecology developed from the study of biology - D.
The reason why it did was because people were interested in how people pollute a certain environment, but also interested in how environemntal niches are being changed over time with different factors changing. All of these influenced the development of ecology.
