Final answer:
A formal discussion differs from an informal discussion in that it requires preparation, follows specific rules, and is focused on a particular topic.
Step-by-step explanation:
A formal discussion differs from an informal discussion in several ways. Firstly, a formal discussion requires advanced preparation, meaning that participants must gather information and develop their arguments beforehand. Secondly, a formal discussion follows specific rules for speaking, such as taking turns, listening attentively to others, and using professional language. Lastly, a formal discussion typically focuses on a specific topic or agenda, while an informal discussion may cover a wide range of subjects without any specific constraints.
Learn more about formal and informal discussions