Which of the following is an alternative therapy used for pain relief?

Acupuncture is considered an alternative therapy for pain relief due to its unique approach and methodology that differs from conventional medical treatments. It involves the insertion of thin needles at specific points on the body, which is believed to help stimulate the body’s natural healing processes and balance the flow of energy, or "Qi."

This practice has been utilized for thousands of years, particularly in traditional Chinese medicine, and is often sought after for conditions such as chronic pain, migraines, and arthritis. The principles behind acupuncture are based on a holistic view of health that encompasses physical, emotional, and spiritual well-being.

In contrast, while massage therapy, physical therapy, and chiropractic adjustments are instrumental in managing pain, they are generally categorized as complementary or rehabilitative therapies rather than alternatives. Massage therapy relaxes muscles and improves circulation, physical therapy enhances recovery through exercises and modalities, and chiropractic adjustments focus on spinal alignment and nervous system function. Though effective, these therapies do not carry the same historical and philosophical significance as acupuncture in the realm of alternative medicine.