Final answer:
The cecum is the part of the large intestine that attaches to the appendix.
Step-by-step explanation:
The correct answer to this question is option A) cecum.
In the large intestine, the cecum is the part that attaches to the appendix. It is the first part of the colon and is located in the lower right side of the abdomen.
Food residue enters the colon through the cecum and then travels up the ascending colon, bends to form the transverse colon, and eventually passes through the descending colon to enter the sigmoid colon.