complete the sentence.\nreflexes and automatic functions such as heart rate and digestion, but it also…

complete the sentence.\nreflexes and automatic functions such as heart rate and digestion, but it also controls the movement of eyes, arms, and legs.\nthe brain stem controls not only\nnot only does the brain stem control
Answer
Brief Explanations:
The given sentence uses the "not only... but also..." structure. The first option "The brain stem controls not only" is a more natural - starting way to complete the sentence as it follows the normal subject - verb - adverbial structure. The second option "Not only does the brain stem control" is in an inverted structure which is less common in this context when simply completing the given sentence.
Answer:
The brain stem controls not only