Answer:
Hey srry It kicked me out of my account lol
Explanation:
is a technique for printing<span> text, </span>images<span> or patterns used widely throughout </span>East Asia<span> and originating in </span>China<span> in antiquity as a method of </span>printing on textiles<span> and later </span><span>paper hope this helped </span>
The Mound Builders used metal tools, and were probably metal builders. Based on that information I would say the answer is B.Copper, because copper is a metal.
