What is the use of umbilicus?​

Actually Welcome to the Concept of the Biology.

=> The umbilicus is used to visually separate the abdomen into quadrants and is often regarded as the body's center of balance, serving as an important anatomical landmark.

=> It's also used for introducing laparoscopic ports during laparoscopic surgery and can be a tell-tale sign of intra-abdominal pathologies.

the answer to your question is b

the correct answer in apex is tissue development, i know because i just had this question