1. part a: which statement best expresses
the central idea of the text?
a. people have different dreams for different
reasons, making it difficult for scientists to
answer the question "why do humans dream? "
b.
most of the theories that scientists have about
dreams show their benefits; however, there
are no concrete conclusions for why humans
dream.
c. scientists struggle to understand why people
dream as there is currently no way to see what
goes on in the brain when someone sleeps.
d.
since humans are the only creatures that
dream, scientists believe that dreaming is an
important part of humans' advanced
intelligence.

B.  Most of the theories that scientists have about  dreams show their benefits; however, there  are no concrete conclusions for why humans  dream.

Explanation:

A lot  of what scientists think about dreams is just theorizing.

This sentence in the text shows that the theories on why we dream remain pure guesses and that there are no clear arguments to support these statements.

Scientists agree that dreams can have many benefits.

Dreams have proven to help people solve complex problems, provide inspiration, but unfortunately the deeper meaning as for why we dream remains unknown.

i think the beatles

explanation: they are talked about more.