Identify the correctly punctuated sentence.

a. Throwing the football, us difficult for some people.
b. Throwing the football, he pulled a muscle in his arm.
c. Throwing, the football, kicking field goals and tackling are all important.
d. Throwing the football he did not notice the coach approaching.

b. Throwing the football, he pulled a muscle in his arm.

The correctly punctuated sentence is option b: "Throwing the football, he pulled a muscle in his arm."

The correctly punctuated sentence is option D: "Throwing the football, he did not notice the coach approaching."

To identify the correctly punctuated sentence, we need to look for proper use of punctuation. In option A, there is a comma splice (using a comma to join two independent clauses without a coordinating conjunction) between "Throwing the football" and "us difficult." In option B, there is a comma incorrectly placed after "football." In option C, there are unnecessary commas around "the football."

However, option D correctly uses a comma to set off the introductory phrase "Throwing the football" before the independent clause "he did not notice the coach approaching." This is the sentence that is punctuated correctly.

Identify the correctly punctuated sentence.

a. On June 3 1965, Ed White became the first American to walk in space.
b. George Washington was born on February 22, 1732.
c. What happened on July 4 1776?
d. On June 6, 1944 the Allies landed in Normandy.

The correctly punctuated sentence is option d: "On June 6, 1944 the Allies landed in Normandy."

The sentence uses a comma after the introductory phrase "On June 6, 1944" to separate it from the main clause "the Allies landed in Normandy." This comma placement is correct, making option d the correctly punctuated sentence.