Someone answer these questions, i've been stuck on this for about a hour now.

question 1 (1 point)
which section from the article best explains how sleep can affect memories?

question 1 options:

introduction [paragraphs 1-5]

"light sleep stages"

"no longer in control"

"flushing out harmful toxins"

question 2 (1 point)
read the following paragraph from the section "flushing out harmful toxins."

another theory is that sleep is restorative and cleans out harmful toxins that can hurt the brain. during sleep, the space between brain cells increases. this allows harmful toxic proteins to be flushed out. in an october 2013 issue of the journal science, researchers published the results of a study hypothesizing that the brain uses sleep to flush out harmful waste. this waste removal system, they suggest, is one of the major reasons why we sleep. by removing harmful waste from the brain, sleep may stave off diseases like alzheimer's, which is characterized by memory loss.

what conclusion is best supported by the paragraph above?

question 2 options:

sleep might be an important tool to keep people healthy.

people who sleep the most will not get alzheimer's.

the heath benefits of sleep are doubtful, but more research is needed.

people who do not sleep enough always have poor memories.

question 3 (1 point)
the author includes information about the sleep stages first. why does the author choose to provide information about dreaming next?

question 3 options:

to suggest that rem sleep is more important than nrem sleep

to show what happens to the body physically while a person is dreaming

to demonstrate why people cannot usually remember their dreams

to highlight one activity, dreaming, that happens during rem sleep

question 4 (1 point)
what is one reason why the author includes the information about aristotle's beliefs about sleep?

question 4 options:

to explain why sleep is an unusual practice for human beings

to show that people have tried to understand sleep for a long time

to demonstrate that today's scientists learned about sleep from aristotle

to describe some of the connections between sleep and breathing