They advertise the pros and how it would be affect to the consumer
They answers are on google but its not letting me uploading it
The earth is rather large and not exactly a point in space, the author however is comparing it to a point in space because of how vast space really is. A metaphor is basically a comparison (Not exactly true) that doesn't use the words like or as... (That's a Simile.) The earth isn't an actual dot in space. It's big, but because of how big space is, it's compared to a dot... Hope this helps... :)