Humans gave up razor-sharp claws, fangs, sense and instincts in favor of intelligence. This brain-power has enabled humans to make the ultimate adaptation; that of making the environment adapt to us. We have domesticated crops and livestock, we irrigate, we wear clothes, build shelters, air-condition or heat our homes.
A. White lines separating lanes
Answer:
Given the information that we have here, we are told that the Mayans were isolated due to the mountain ranges and surrounding natural barriers. This didn't allow for good trade routes for other civilizations. Due to such isolated conditions and harsh traveling environment, any other nearby civilizations would have not wanted to risk such perils for trade. The Mayans did in fact have natural resources, as we are told here that they used stone, bone, and wood in order to aid in the construction of their cities.
