Which of the following might present a language-related difficulty of reading world literature?
a. different types of technology
c. unfamiliar words
b. different belief systems
d. family structure

  c.  unfamiliar words

Explanation:

Family structure and belief systems can make understanding world literature difficult, simply because they make it difficult to relate to the story. These are not necessarily language-related.

"Unfamiliar words" are the most common reason why literature is difficult to read. The words may be unfamiliar simply because they're unknown, or they may be unfamiliar in the context in which they are used.

c he talks about the us lives lost.

an expression designed to call something to mind without mentioning it explicitly; an indirect or passing reference.