Question

what new form of entertainment emerged with the invention of motion pictures in the late 1800s?
theater performances
radio shows
silent films
interactive video games

Explanation:

Motion pictures invented in the late 1800s initially produced silent films, as synchronized sound for films did not exist yet. Theater performances predate this era, radio shows became popular later in the early 1900s, and interactive video games are a much more modern entertainment form.

Answer:

Silent films