Answer:
The National Geographic Society uses revenue from the magazine to fund expeditions and give grants to scientists for further research.
It most likely gives a negative connotation because something being on fire is usually not a good thing. So if your marriage is on fire it is probably not going so well and may need to be put out or in other words Divorce
Subordinating conjunction, relative pronoun, interrogative pronoun, or expletive which cannot express a complete thought.
