Which of the following functions like a fulcrum in a lever? A. tendons connecting muscle to bone at a joint
B. ligaments connecting bones at a joint
C. two muscles working as a pair to move a joint
D. two bones meeting at a joint

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.