Select the option that can be used as a one-word substitute for the given group of words.

Unselfish interest in the welfare of others

Altruism

The one-word substitute for the given group of words "unselfish interest in the welfare of others" is altruism.

• Celibacy means abstaining from sexual relations.
• Misanthropy means a dislike of humankind.
• Egoism means a belief in the importance of one's own interests.
• Altruism means unselfish concern for the welfare of others.

The word altruism is the most appropriate because it specifically refers to a selfless concern for the welfare of others. The other words do not have the same connotation of unselfishness.