Final answer:
Sonia Rykiel, a French fashion designer, was crowned the 'Queen of the Knits' in American Fashion in 1967 due to her signature sweaters and innovative knitting techniques.
Step-by-step explanation:
The person who was crowned "Queen of the Knits" in American Fashion in 1967 is Sonia Rykiel. Sonia Rykiel was a French fashion designer, known for her sweaters and knitwear, which became her trademark. Her innovative inside-out stitching technique and use of high-quality Italian wool made her a standout in the fashion industry. She was also known for her 'Poor Boy Sweater,' which appeared on the cover of French Elle magazine, and contributed significantly to her fame. In 1967, the fashion industry and the press recognized her unique contributions by bestowing upon her the informal title of "Queen of the Knits," acknowledging her influence and creativity in the world of knitwear.