In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blanks out of the given alternatives.

Studies have shown that good quality sleep is important in ___(1)____ good mental health. Think back to times when you’ve awoken and felt well-rested – how much clearer was your mind, your emotions and your overall mood?

Although the ___(2)____ between sleep and mental health is not completely understood, it’s generally ___(3)____ that getting a good night's sleep can help your mental and emotional resilience against mental illnesses such as depression and anxiety. It’s believed that during the REM (Rapid Eye Movement) cycle of sleep, your mind begins to dream and it’s at this stage during the night which contributes to emotional health. Unfortunately, ___(4)____ in sleep can interrupt these cycles which can impair thinking and emotional regulation. 

But sleep doesn’t just ward off risks of mental illness; it also helps ___(5)____ general mental functions as well. For example: throughout your day, your brain is taking in new information and responding to all kinds of stimuli. Then at night, sleep gives your brain the downtime to consolidate and process this information, and commit it to memory so that it’s ___(6)____ in the future when required.