I would say roux because roux is a mixture of flour and fat to thicken things
C. Expressed ( permission for something that is given specifically, either verbally or in writing )
<span>The word cochleostomy has three parts. The prefix "co-" means "mutually" and the </span>suffix "-stomy" means "a surgery involving an artificial opening." The root word "cochlear" refers to part of the inner ear. Therefore, cocholeostomy refers to a surgery implanting something in the inner ear.
Answer: prefix = co, root = cochlear, suffix = stomy
Hope this helps!