So what’s happening?
In spoken language, we tend to connect clauses with conjunctions.
In written factual texts, it’s different. A lot of information gets packaged up as nominal groups, which are then connected with verbal groups instead of conjunctions.
Why? To increase information density. The verbal groups contain more information than conjunctions, so by using verbal groups instead of conjunctions writers can pack in more information per word.
Compare these two lists of words:
- Because, and, or, instead, so
- Will tell, saw, rewarding
The first list shows all the conjunctions from the conversational version above. The second list shows the verbal groups from the source snippet.
The conjunctions communicate no information on their own, however the verbs carry meaning. And means nothing by itself; it can only serve to connect two pieces of information. Saw means something; it contains information about a process.
The point is that in factual texts writers tend to use conjunctions very sparingly. Instead they rely on verbal groups to connect clauses, because the verbal groups pack more meaning with fewer words.