Here's how each of the descriptions aligns with passive voice or active voice:
- to emphasize an action - passive voice
- to write clear, concise sentences - active voice
- to tell about rules or laws - passive voice
- to explain an action when the subject is unknown - passive voice
- to emphasize who is responsible for something - active voice
- to avoid responsibility - passive voice
In summary:
- Passive Voice: to emphasize an action, to tell about rules or laws, to explain an action when the subject is unknown, to avoid responsibility.
- Active Voice: to write clear, concise sentences, to emphasize who is responsible for something.