Final answer:
Armani Williams competes in NASCAR as the first openly autistic person and is also one of the few active Black competitors in the sport.
Step-by-step explanation:
Armani Williams competes in NASCAR, which is a professional stock car racing league. As the first openly autistic person in the sport, Williams is notable for breaking barriers and advocating for autism awareness. Additionally, Williams marks a significant presence as one of the few active Black competitors in a predominantly white sport. His participation in NASCAR not only highlights diversity within the sport but also demonstrates the expanding inclusivity in high-performance competitive arenas.