Answer;
-Omission
Colons are not used to introduce omissions.
Step-by-step explanation;
-A colon instead of a semicolon may be used between independent clauses when the second sentence explains, illustrates, paraphrases, or expands on the first sentence.It is also a very useful tool for separating independent clauses from quotations.
-Colons may be used to introduce an item or a series of items, when making a list, among others.