Question

sleep researchers agree that: dreams are meaningful. we need rem sleep. dreams have an important function. dreams are meaningless.

Explanation:

Sleep researchers generally recognize the importance of REM (Rapid - Eye Movement) sleep for overall sleep quality and various physiological and psychological functions. While the meaning and function of dreams are still debated, the need for REM sleep is a more widely - agreed - upon fact in sleep research.

Answer:

we need REM sleep.