Sensorimotor learning. for the Penn Foster test the answer is A
I will need an image to be able to explain
A. it should capture the reader's attention and state the main idea.
Option b is the purpose of the body paragraphs, option d is the purpose of the conclusion, and it cannot be option c because there should be no transitioning between concepts in the introduction of a paper :)
The Incas had a technologically advanced frame of mind while the Aztecs believed in sacrifice of humans. Both the Incas and Aztecs believed in and worshipped the sun god.