* Simple: The doctor's altruistic actions saved countless lives.
* With a contrast: While some people donate for tax benefits, others are purely altruistic in their giving.
* Descriptive: The altruistic volunteer spent her days helping the homeless find shelter.
* Figurative: The artist's altruistic spirit was evident in her desire to share her work for free with the community.
* Complex: The study showed that altruistic behavior is often driven by a combination of emotional and cognitive factors.