Final answer:
The best vineyards of the Northern Rhône are steep. Option c.
Step-by-step explanation:
The best vineyards of the Northern Rhône are steep. The best vineyards of the Northern Rhône are known to be steep which allows them better sun exposure, heat, and drainage, contributing to the high quality of wine produced in the region.
The best vineyards of the Northern Rhône are steep. This geography means the vines have better exposure to sunlight and heat, which is beneficial for the growth of the grapes. The steep slopes allow for better drainage which is essential as vines typically thrive in well-drained soil that forces their roots to go deep into the ground to get nutrients. Unlike flat or poorly drained vineyards where water can gather and potentially cause the roots to rot, or coastal vineyards which might be more influenced by maritime climate, the steep vineyards of the Northern Rhône are considered some of the best due to their optimal growing conditions for the Syrah grape, among others.