Question

when you brush your teeth, which parts of your teeth do you brush first? your top teeth or your bottom teeth? do you know? whether you realize it or not, most people brush their teeth the same way every time. you might say you do it \brainlessly.\ but, in fact, your brain is completely in charge. why do you brush your teeth the same way every time? brushing the same way reminds your brain. you dont realize that youre brushing the same way. some parts must be brushed before other parts. your brain controls how you brush your teeth. did i pack my soccer jersey? im so excited for todays game! where are my shin guards?

Explanation:

The passage states that most people brush their teeth the same way every time and that the brain is in - charge. So the reason for brushing teeth the same way is that the brain controls how one brushes teeth.

Answer:

Your brain controls how you brush your teeth.