The correct analysis of the reason for terrace farming in the Incan Empire is:
O Terrace farming absorbed rainwater better.
Terrace farming was an important agricultural technique used by the Incas, particularly in the mountainous regions of the Andes. This method helped to create flat areas of arable land on steep slopes, which facilitated better water management and reduced soil erosion. The terraces allowed for efficient absorption of rainwater, which was crucial for growing crops in a landscape where traditional farming would be challenging due to the uneven terrain.