Tina's eyes water every time she chops onions. her response is an example of a

I believe the answer is: Reflex

Reflex is an action that performed by our body that happened without conscious thought. Reflect a movement is a form of self-defense mechanism that exists to prevent our body from getting some sort of harm.
Other example of a reflex movement would be when you yanked your hand away if it touch something hot.

Bob: coke is baby pandas.jim: what? how do you figure that coke is baby pandas? bob: because this book says so.jim: how do we know the book is correct? bob: because it says that coke is baby pandas.jim: how does that prove the book's accuracy? bob: because it's statement involving coke and baby pandas is correct, therefore it is accurate.jim: how do we know that it's correct? bob: because we have concluded that the book is accurate, and therefore the statement is correct.therefore, coke is baby pandas.