How does the concept of 'ignorance' or 'Avidya' relate to the fear of birth and death?

According to the source material, ignorance (Avidya) is the root cause of all worldly suffering, including the fear of death. Chapter 37 explains that ignorance establishes the perception of manifoldness, or duality, which is the very entry point for fear. This state leads to constant worry and attachment. To counter this, one must acquire knowledge (Vidya) through the scriptures and the Guru. When ignorance is removed, the knowledge of manifoldness vanishes, and for that person, the cycle of birth and death ceases, eliminating the fear associated with it.