The sample above is a phrase, particularly a participial phrase. Remember that participial phrase is consist of words with the -ing or -en form plus its modifiers. This kind of phrase always functions as an adjective. The element that is necessary to complete the sentence is an independent clause.
The novel War of the Worlds is set in England, including London, around 1900.
The writer do not revel it clearly but by the mention of bikes and names as Shoeburyness and many other small details scholars were able to track the narrator and the brother’s movements and find it to be around England countryside in small towns.
to let people know that not wearing a seat belt can
cause death or injury