You are presented with the quiz "the ability to maintain equilibrium is the ability to sense and maintain what?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "balance is the ability to sense and maintain body position" and "balance refers to the ability to maintain equilibrium and to remain in a stable, upright position". 

So, what's the best answer to the question?


 

    body position       