Question

roast beef with a rich brown gravy is often described as a savory dish. the basic taste prominent in such a dish is: salty. sour. bitter. umami.

Explanation:

Umami is the savory taste. Roast beef with rich brown gravy is a savory dish, so the prominent basic taste is umami. Salty is from salts, sour from acids (like citrus), bitter from certain compounds (e.g., in some vegetables).

Answer:

umami.