Which of the following brands is known for its emphasis on denim and casual styles?

The correct answer is supported by the fact that both 3sixteen and A.P.C are brands that place a strong emphasis on denim and casual styles.

3sixteen is recognized for its commitment to high-quality denim, often producing durable products that appeal to denim enthusiasts. Their focus on craftsmanship and classic styles makes them a pivotal brand in the casualwear segment.

A.P.C, a French brand, has also become renowned for its minimalist aesthetic and high-quality denim. It is particularly well-known for its raw denim jeans, appealing to a fashion-conscious audience that appreciates simplicity and enduring style in casual wear.

While 66 Degrees North is a reputable outdoor clothing brand, its primary focus is on outerwear designed for harsh weather conditions rather than denim or casual styles. Thus, the correct answer reflects the synergy between the two brands known for their dedication towards denim and casual fashion.