✅ Correct Answer: Biomechanics

📚 Detailed Explanation:

Biomechanics is the branch of science that applies the principles of mechanics — specifically, the laws of physics — to biological systems. It involves the study of how living organisms move, the forces acting upon them, and how their body structures respond to those forces.

• Physics & Biology: Biomechanics merges physics (especially mechanics) with biology to understand movement, posture, locomotion, and mechanical functioning in humans and animals.
• Applications: It is widely used in sports science, physical therapy, orthopedics, ergonomics, and bioengineering.
• Examples: Analysis of running mechanics, joint stress in athletes, the design of prosthetic limbs, and robotic movement inspired by humans.

❌ Why the Other Options Are Incorrect:

• Ergonomics: Focuses on designing equipment and workplaces to fit human use efficiently and safely; it’s not centered on motion mechanics.
• Motor Development: Studies how movement skills evolve over a person’s lifespan; it emphasizes learning stages, not physics-based analysis.
• Physiology: Concerned with biological functions and processes within organisms — like respiration or digestion — rather than mechanical motion.

🧾 Summary:

✔️ Term: Biomechanics

✔️ Definition: The scientific study of the mechanical laws relating to the movement or structure of living organisms.