Hand-written welcome notes are an example of

Observable artifacts

Explanation:

Observable artifacts refers to the type of artifact that provide a visual representation to a certain group or culture. Observable artifacts will always have a physical form.

Other examples of observable artifacts are Statues from ancient rome, architectures from eastern europe, Vase and porcelain from Ancient china, etc.

chavez's example shows that nonviolent protest can work well. it shows that one nonviolent man can stop a mob, which proves chavez's point and persuades people to protest nonviolently.

answer; /// the above statement is (true );