The correct answers for the poetic elements you've described are:
- The repetition of sounds is alliteration.
- When two or more words in a line or short section begin with the same sound, it is also referred to as alliteration.
- The description of the same consonant sound appearing anywhere in several words in a line or short section of a text is known as consonance.
So the answers are:
- Alliteration for both the first and second descriptions.
- Consonance for the third description.