Final answer:
Humorous decimas satirize an individual's weaknesses or foolish acts through the use of humor and satire.
Step-by-step explanation:
Satire is the use of humor, exaggeration, or ridicule to expose human ignorance, vice, or foolishness-as well as other human weaknesses. In the context of humorous decimas, they would typically satirize an individual's weaknesses or foolish acts. The purpose of satire is to critique and mock certain behaviors or practices, often in a lighthearted and humorous way. Writers like Jonathan Swift and Charles Dickens are known for using humor and satire to address serious issues and make their readers think.