Final answer:
The most marbled and tender cut of beef is typically the Ribeye. Other highly marbled and tender cuts include Prime Rib, Bone-in-Ribeye, and T-Bone.
Step-by-step explanation:
The most marbled and tender cut of beef is typically the Ribeye. It is known for its abundant fat marbling throughout the meat, which gives it a rich flavor and makes it very tender. The Prime Rib is also a highly marbled and tender cut, as it is taken from the same section of the primal rib as the ribeye, but it may have more bone attached. The Bone-in-Ribeye is another term for a ribeye steak that is still attached to the bone, which can add additional flavor and juiciness to the meat. The T-Bone is a steak that consists of both the strip steak (similar to a ribeye) and a portion of tenderloin, making it tender and flavorful as well, but it may not be as highly marbled as the ribeye.