Answer:
Due to their living in harsh environment.
Step-by-step explanation:
The Mayans were considered as the best civilization because they were able to flourish in unstable climatic conditions. Mayans civilization used the natural resources of area such as limestone, salt and volcanic rock for their economic growth as well as defense purpose. Other civilization settles where there is good climate and availability of resources whereas the Mayans civilization lives in the harsh climatic conditions which make them the best civilization.