6. which of the following is the combining form for lower back? cervic/o thorac/o lumb/o crani/o

# Brief Explanations: - **cervic/o**: Refers to the neck. - **thorac/o**: Refers to the chest. - **lumb/o**: Refers to the lower back (lumbar region). - **cranio**: Refers to the skull. # Answer: lumb/o