Question

what are hockey pucks made of?
tires
uno cards
vulcanized black rubber
ash from a rubber tree

Explanation:

Hockey pucks are typically made of vulcanized black rubber. Tires are made of rubber but not the direct material for pucks, Uno cards are plastic - like and not related, and ash from a rubber tree is not the material for hockey pucks.

Answer:

The correct option is the one with "vulcanized black rubber" (the green - colored option).