Why do we have nightmares and crushes please help

A source of confusion or anxiety for most, nightmares may serve a very beneficial purpose, according to researchers.

Nightmares are helpful to our survival or else they probably would have been done away with by evolution, said Deirdre Barrett, a psychologist at Harvard University. Barrett theorizes that nightmares act as the brain's way of focusing a person's attention on issues they need to address.

"Nightmares probably evolved to help make us anxious about potential dangers," Barrett said. "Even post-traumatic nightmares, which just re-traumatize us, may have been useful in ancestral times when a wild animal that had attacked you, or a rival tribe that had invaded might well be likely to come back."

But this evolutionary alarm bell may not be so useful in today's world.

I believe that nightmares happen due to trauma that has happened to a person in some way, shape, or form.

I also believe that crushes are just fantasy relationships that someone wants to have for the experience of it. I am not really sure due to the fact that I have never had a crush or anything like that so I am not all that experienced with the topic.

Explanation:

b

explanation:

5 because 2, 3, 4 are incomplete. it could be 1, but i say its 5