Law states that bones grow or remodel in response to demands placed on the bone.

Choice A reason: While muscle names can reflect location (e.g., brachialis for the arm), the names "biceps," "triceps," and "quadriceps" specifically refer to the number of origins, not their anatomical position.

Choice B reason: "Biceps" means two heads, "triceps" means three heads, and "quadriceps" means four heads. These names are derived from the number of tendinous origins each muscle has, making this the correct classification.

Choice C reason: Muscle shape does influence naming in some cases (e.g., deltoid for triangular), but it is not the basis for naming biceps, triceps, or quadriceps.

Choice D reason: Fascicle arrangement refers to the pattern of muscle fibers (e.g., parallel, pennate), which affects function and strength but is not the naming basis for these specific muscles.

Choice A reason: The humerus is the upper arm bone and articulates with the glenoid cavity of the scapula, not the acetabulum.

Choice B reason: The patella is the kneecap and articulates with the femur, not the acetabulum.

Choice C reason: The acetabulum is the deep socket in the pelvic bone that articulates with the head of the femur, forming the hip joint. This ball-and-socket configuration allows for a wide range of motion and stability.

Choice D reason: The tibia is the larger bone of the lower leg and articulates with the femur at the knee joint and the talus at the ankle. It does not connect to the acetabulum.