Final answer:
The primary material used in the creation of Andean Silver and Gold Maize Cobs is sheet metal/repousse (gold and silver alloys), utilized in skilled metalworking techniques for ceremonial and decorative arts.
Step-by-step explanation:
The primary material used in the creation of Silver and Gold Maize Cobs in Andean Art is Option 2: Sheet metal/repousse (gold and silver alloys). Andean artists were particularly skilled in working with precious metals, including gold and silver, to create various ceremonial and decorative objects. Evidence of the extensive use of metals in Andean art includes ceremonial knives called tumis, and Inka figurines depicting humans and llamas, crafted from silver and gold. The Metalwork in the Andean region was sophisticated, with techniques such as depletion gilding, hammering, soldering, and setting stones to produce richly decorated artifacts, which indicates sheet metal as the primary medium.