To answer this question, we need to analyze the given options and identify the word that does not belong with the others.
Option A) dodge - This word is related to evading or avoiding something quickly, such as dodging a ball or dodge a question.
Option B) flee - This word means to run away or escape from a dangerous or unpleasant situation.
Option C) duck - This word can mean to lower one's head or body quickly to avoid being hit or to evade something.
Option D) avoid - This word means to stay away from or prevent something from happening.
From the given options, the word that does not belong with the others is "B. flee." While the other options (dodge, duck, and avoid) are all related to evading or avoiding something, "flee" specifically refers to running away or escaping from a dangerous or unpleasant situation. This makes "B. flee" the odd one out in this group.
Therefore, the correct answer is B. flee.