The most accurate response explaining the reason for terrace farming in the Incan Empire is:
Terrace farming absorbed rainwater better.
Terrace farming was essential for the Incas as it allowed them to cultivate crops on the mountainous terrain by creating flat areas that could effectively capture and manage rainwater. This method also helped reduce soil erosion and made it possible to grow a variety of crops in a challenging environment. The other options do not accurately represent the primary benefits and purposes of terrace farming in this context.