QUESTION 1: According to the text, what are tongue twisters from a technical perspective?

2nd QUESTION: What are classics such as "Three sad tigers" and "How many stories do you tell" used for?

Repeat by rote without pre-reading until failure
Read once to familiarize, a second time pacing and then increase speed without losing form
Practicing only isolated consonants for hours at a time
Improvise new rhymes each time without repeating the text

Generate fatigue that hinders daily articulation
Improve only memory and not diction
Train the brain to send faster and more accurate motor signals to the speech organs
Serves only for children's audiences