Which of the following explanations can help parents of a pre-school child distinguish night terrors from nightmares?
1) Night terrors occur during deep sleep and are characterized by sudden fear and screaming, while nightmares occur during REM sleep and are characterized by vivid and disturbing dreams.
2) Night terrors occur during REM sleep and are characterized by vivid and disturbing dreams, while nightmares occur during deep sleep and are characterized by sudden fear and screaming.
3) Night terrors and nightmares are the same thing and can be distinguished based on the child's age.
4) Night terrors and nightmares are both caused by external factors and cannot be distinguished.
