Snap decisions avoidkeep people from danger. Snap decisions keep people from danger.

But snap decisions also bring many negative effects, such as the tendency to stereotype people in interpersonal interactions; and. Also, the unconscious association of fast food with speed and impatience in our own personal behavior, bringing leads us to be impulsives into whatever else we are doing. But snap decisions also bring many negative effects, such as the tendency to stereotype people in interpersonal interactions. Also, the unconscious association of fast food with speed and impatience in our own personal behavior leads us to be impulsive in whatever else we are doing.

We should try to suspend some hard-wired reactions, which areis what differentiates us from animals. We should try to suspend some hard-wired reactions, which is what differentiates us from animals.

"is" because it refers back to "try to suspend" which is singular. Not "hard-wired reactions" which is plural. ... "What differentiates us from animals is that we can suspend some hard-wired reactions."