Acrylic Paint was first used in the 1940's but if those are the only one's to chose from i would say 1950's
Answer:
Joints, cartilage, ligaments, and tendons
Explanation:
Cartilage acts as a shock absorber to reduce friction. Ligaments help stabilize the joint, keeping it from moving outside of its intended range of motion. Tendons connect the skeletal system to the muscular system by attaching muscle to bone.
Answer: treble, alto, bass