Conversation so far:
What is the Migration Period art?
Migration Period art denotes the artwork of the Germanic peoples during the Migration period.
Can you clarify how Migration Period art is portable?
Migration Period art is portable because the people during that time lived nomadic lifestyles. They made art that was mobile such as weapons, horse harness, tools, and jewelry.

Question: What other characteristics define this art?
Self-contained rewrite: What other characteristics define Migration Period art?