Final answer:
The term for treatment using exercises, manipulation, heat, and other remedial agents is physiotherapy, employed by physiotherapists to aid in recovery.
Step-by-step explanation:
The term used for diagnosis and treatment by means of remedial agents, such as exercises, manipulation, heat, etc., is physiotherapy. Physiotherapists are highly trained health professionals who specialize in the mechanics of body movements and use drug-free, hands-on approaches to help patients recover. They use techniques like exercises, manual therapy, heat treatments, and in some cases, supplementary methods such as acupuncture or ultrasound to assist in the healing process. Chiropractors also utilize similar methods in their treatment programs, focusing on manual techniques such as spinal manipulation.