Sophia was exhausted and angry, she hadn't slept well for a week now. is this a run on? or a comma splice? or correct?

Sophia was exhausted and angry, she hadn't slept well for a week now is an example of comma splice

Explanation:

Comma splice occur when you incorrectly use commas to connect two independent clauses. Commas however work really well if you want to separate a series of items with conjunctions.

This is a perfect example of comma splice. Both the statements are independent clauses, because they make sense as individual sentences  

folding him safely under her wing

the service industry in the united states grew in the late 1800s. what was one effect of that growth?

the number of people with jobs in factories as unskilled workers decreased.

the number of people with jobs in factories as unskilled workers increased.

the middle class grew as people took jobs as clerks, lawyers, and teachers.

the middle class shrank as people left jobs as clerks, lawyers, and teachers.