Answer:
B. Certain Images--such as a lion--can be used to symbolize power.
Step-by-step explanation:
One of the functions of dashes is to enclose clarifications, explanatory content, remarks, or further information that is not essential to the meaning of the sentence; it can be used in pairs (when they are in the middle of a sentence) or alone (mainly when they are at the end of the sentence). From all options, sentence B is the one using the dashes correctly because they are being employed to enclose additional and explanatory information that, if removed, would not affect the meaning of the sentence.