Hello.
Written language often requires a more fluent level of comunication, which can prevent people from expressing their attitudes and emotions.
Spoken language, however, allows the speakers to add their own touch to the conversation, like facial expressions and hand movements.
Hope I helped.
They were looking for the passage
The first sentence seems more descriptive in saying that it was the ones who made beads while the second sentence uses the commas to show that it is a definition, not a specification
