The chef has not made the cake.
Turn it into the Passive Voice.

In a sentence using passive voice, the subject is acted upon he or she receives the action expressed by the verb.

Object + Verb + Subject

The cake was not been made by the chief.

i guess the cause and effect would show how being around the smoke(the cause) can have negative effects on the body.

explanation:

one thousand and one nights, also known as arabian nights is a collection of stories whose basic structure is that of embedded narrative. this technique refers to a main story which works as the common frame - or framing narrative - for the other stories, and then this series of stories which are connected to the main one. this technique can also be referred to as a story within a story. the stories stem from the original tale, some begin and end on their own, some are connected to the previous or following one, by means of questions that are answered in the subsequent tale, or characters which reappear.