1.

1). Kiwis are one of few fruits containing a good amount of the nerve messenger serotonin, because it has a relaxing effect and can help you fall asleep faster while curbing carb cravings.2).3). Containing a good amount of the nerve messenger serotonin, Kiwis are one of few fruits which has a relaxing effect and can help you fall asleep faster while curbing carb cravings.4). Kiwis are one of few fruits containing a good amount of the nerve messenger serotonin, which has a relaxing effect and can help you fall asleep faster while curbing carb cravings.

Answer»

The sentences should be read carefully to understand the meaning clearly. The nerve messenger Serotonin present in Kiwis has a relaxing effect and can help one fall asleep faster. Serotonin also helps in curbing CARB craving.

Option 3 is INCORRECT as kiwis should be followed by have not has as the word is plural.

Option 1 can be eliminated because the conjunction because is used to provide explanations or reasons. It has been incorrectly used as the part of the sentence following because describes the functions of Serotonin.

Option 4 seems to be appropriate. The conjunction while used here INDICATES that two effects or actions HAPPEN at the same time.

Therefore, the correct answer is option 4.



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