Answer:
The allusion is the first sentence mentioned in the passage.
Step-by-step explanation:
This passage is using allusion to compare the skilled person in the author's drawing class as "Budding Picasso", although he/she isn't necessarily one.
In conclusion, an allusion is defined as something that is indirectly stated, and it is up to the reader to make the connection between them.
I hope this helped, let me know if you have any questions!
~Jinachi~