Answer :
Final answer:
The Inca civilization is renowned for its advanced stone architecture, terrace farming, and complex road networks. These achievements reveal their excellent engineering and agricultural skills.
Explanation:
The Inca civilization is known for several remarkable achievements in various fields. The main answer to your question is: d) All of the above. The Inca demonstrated advanced stone architecture in their great cities like Machu Picchu, which features impressive masonry work with giant fit-together stones. Additionally, they pioneered the technique of terrace farming on the steep Andean mountains, which not only enabled efficient agriculture but also prevented soil erosion. Further, the Inca created an elaborate system of complex road networks that spanned across their extensive empire, facilitating efficient communication and transportation. Taken together, these achievements attest to the Inca's extraordinary engineering and agricultural skills.
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