Can someone help me understand this better on what she means by this with procedures

The most likely reason king uses allusions in this part of his speech is to

Match the description to the term. 1. textbooks conference usage 2. elements surround a word which clarify the meaning casual usage 3. the way in which english is used context 4. family and friends frozen usage 5. friends at a football game formal usage 6. teachers and employers intimate usage 7. making an appointment usage

Which literally device involves the repetition of vowels sounds across successive or closely placed words