Q:Given the following passage  "Some consider storyboards and wordless novels to be comics. Film studios, especially in animation, often use sequences of images as guides for film sequences. These storyboards are not intended as an end product and are rarely seen by the public. Wordless novels are books which use sequences of captionless images to deliver a narrative.",  answer the following question. Note that the answer is present within the text.  Question: What are sequences of images used in movie production know as?
A:
storyboards