Rewrite the following sentences in order to correct the punctuation.

In the morning Shelby ate a peanut butter sandwich and an apple she rode her bike to school.

After running the half marathon; Amelia was too tired to walk her dog.

In the morning Shelby ate a peanut butter sandwich and an apple. She rode her bike to school.

I'll be glad to check your correction for the second sentence

Amelia was too tired to walk her dog, after running the half marathon. Is that right? And thank you.

A comma is not needed in your sentence.

You could also leave the first sentence as it is, except replace the semi colon with a comma.

To correct the punctuation, you need to add appropriate punctuation marks to separate the different clauses and clarify the meaning of the sentences. Here are the rewritten sentences with corrected punctuation:

1. In the morning, Shelby ate a peanut butter sandwich and an apple. She rode her bike to school.
Explanation: Splitting the original sentence into two separate sentences with a period after "apple" and adding a capital letter to start the second sentence.

2. After running the half marathon, Amelia was too tired to walk her dog.
Explanation: Removing the semicolon after "marathon" and replacing it with a comma to correctly introduce the second clause.