Final answer:
The original sentences do not contain a subordinating conjunction but can be combined into a complex sentence using one, such as 'because', to explain the relationship between the mom staying home and quitting her job.
Step-by-step explanation:
The phrase 'My mom will stay home. She has quit her job' does not contain a subordinating conjunction, but it can be connected by one to create a complex sentence. In the given examples, the use of subordinating conjunctions and coordinating conjunctions helps to elaborate on relationships between ideas and provide more context or additional information. For instance, 'because' can be used to explain why the mom will stay home: 'My mom will stay home because she has quit her job.' This provides the reason for the mom staying home and connects both sentences into one, demonstrating how a subordinating conjunction functions to subordinate one clause to another, making it dependent.
Other examples that illustrate the use of conjunctions or the lack thereof in complex sentence structures include describing financial sacrifices using 'for', personal decisions related to family needs, and the effects of personal choices on daily life. Each scenario nuances the way conjunctions contribute to the meaning of a sentence.