Taking a quiz & i don’t understand please help

What are the main functions of the human skeleton? a exchange of gases b support and movement c sensing the environment d digestion and excretion

Which courtroom participant is james in the given scenario? josh, the accused, is undergoing a criminal trial. mr. kent, josh’s neighbor and college professor, has been called upon to vouch for josh’s good conduct, academic performance, and likeable behavior. mr. kent is thus playing the role of a in the courtroom.

Which of these statements properly demonstrates the angle addition postulate for the m∠afc m∠afc ? a. m∠afc=m∠afb+m∠bfd m∠afc=m∠afb+m∠bfd b. m∠afc=m∠afb+m∠bfc m∠afc=m∠afb+m∠bfc c. m∠afc=m∠cfd+m∠dfe m∠afc=m∠cfd+m∠dfe d. m∠afc=m∠afb+m∠dfc+m∠cfb m∠afc=m∠afb+m∠dfc+m∠cfb