What is the central idea of the third section:
Why Do We Dream?
People may dream to improve long-term memory
and process new information.
All mammals experience the same sleep cycles
and changes during sleep.
Dreams have a positive long-term effect on the
memories of babies.
Although sleep studies have been going on for
years, there are no definitive answers.

Excerpt from the trip of a lifetime elizabeth mohn 3 a little more than a week ago, my mother and father started packing our suitcases to prepare for our trip. my entire family woke up early sunday morning, packed the car, and began our expedition to niagara falls. when we reached the american-canadian border, i was excited to enter a foreign country for the first time. the third paragraph is mainly about a) traveling to niagara falls b) leaving the hotel. c) seeing the falls. d) returning home.