Answer:
Ellipsis is another cohesive device. It happens when, after a more specific mention, words are omitted when the phrase must be repeated.
A simple conversational example:
A: Where are you going?
B: To dance.
The full form of B's reply would be: "I am going to dance".
A simple written example: The younger child was very outgoing, the older much more reserved.
The omitted words from the second clause are "child" and "was".
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