Final answer:
Tight hip flexors, weak abdominal muscles, and a weak glute complex are causes of lower back pain due to their role in stabilizing the spine and maintaining posture.
Step-by-step explanation:
Tight hip flexors, weak abdominal wall, and a weak glute complex can lead to lower back pain due to the interconnectedness of these muscles with the lumbar spine and the overall posture and stability of the body. The posterior abdominal wall, which is made up of the lumbar vertebrae, parts of the ilia of the hip bones, psoas major and iliacus muscles, and the quadratus lumborum muscle, is crucial for stabilizing the spine and maintaining proper posture.
Dysfunction in this area can cause compensatory movement patterns and muscle imbalances that result in lower back pain. Therefore, a) Causes of lower back pain is the correct answer to the student's question.