Fill in the blank with the most appropriate word.

The wise try to improve themselves ______ the fools keep blaming their luck.

whereas

The wise try to improve themselves whereas the fools keep blaming their luck.

Explanation:

• Therefore: This word indicates a logical consequence or result, but it doesn't provide the contrast needed in this sentence.

• Whereas: This is the correct choice. "Whereas" is used to introduce a contrasting statement or idea. In this context, it contrasts the behavior of the wise and the fools.

• Still: "Still" can indicate a continuation or persistence, but it doesn't provide the needed contrast or comparison between the wise and the fools.

• Whether: This word is used to introduce a choice between two options, and it doesn't fit the context of contrasting behaviors between the wise and the fools.