Final answer:
Mary Quant is the English designer credited with pioneering Mod fashion, which includes the miniskirt among her various contributions to 1960s fashion.
Step-by-step explanation:
The English designer credited with the innovation of Mod fashion, including the creation of the miniskirt, hotpants, the 'scuba' suit, patterned tights, and duvet cover is Mary Quant. Mary Quant was a seminal figure in the 1960s London-based Mod movement, and she contributed significantly to the fashion of the era. Her designs reflected a youth-oriented, forward-looking ethos that embraced simplicity and fun, as well as practicality and freedom of movement, challenging the more conservative styles of the previous decades.
She was a prominent figure in the fashion industry during the 1960s and is often referred to as the creator of the miniskirt. Quant's designs revolutionized women's fashion, introducing youthful and daring styles that reflected the changing attitudes of the time.