Write three unique sentences, each using a comma in a different way. Explain why the comma is needed in each sentence. (4 points)
1. Before heading out to the store, make sure to grab your wallet.
Explanation: The comma is needed to separate the introductory clause "Before heading out to the store" from the main clause "make sure to grab your wallet."
2. The cat, sleek and black, slowly made its way down the sidewalk.
Explanation: The comma is needed to set off the descriptive phrase "sleek and black" from the subject "the cat."
3. I enjoy hiking, swimming, and biking in the great outdoors.
Explanation: The comma is needed to separate items in a list ("hiking," "swimming," and "biking") to make the sentence clear and easy to read.