My homework key says that a is the correct answer, but I'm unsure why. How does the addition of "three props" change anything? In other words, how do I recognize when to apply this rule:
"Use a colon after an independent clause to introduce
- a list of particulars,
- an appositive,
- an amplification [spelling out/elaboration/addition of detail/explanation]
- [a consequence], or
- an illustrative quotation".
Which of the following statements uses colons correctly?
a. Your dedicated whittler requires three props: a knife, a piece of wood, and a back porch.
b. Your dedicated whittler requires: a knife, a piece of wood, and a back porch.