Question

what does the structure of the word \altruistic\ tell the reader about its meaning?
the word stem tells the reader that the meaning is related to \believe.\
the word stem tells the reader that the meaning is related to \body.\
the suffix tells the reader that the meaning is related to \having the quality of something.\
the suffix tells the reader that the meaning is related to \the state or condition of something.\

Explanation:

The word "altruistic" has the suffix -istic which often implies having a certain quality. It's not related to "believe" or "body" in its stem - and -istic is not about a state or condition but a quality.

Answer:

The suffix tells the reader that the meaning is related to "having the quality of something."