COMPRISE vs. COMPOSE
Here are another two words that often trick us up.
To keep writers in the clear, style guides advise avoiding this construction and opting instead for composed of, consisting of, or made up of. However, it is worth noting that “be comprised of” is recorded in dictionaries as synonymous with “be composed of,” and will generally get your point across satisfactorily in informal settings.
Clancy's comment: Mm ... Nothing simple about English.