Which sentence has a misplaced modifier?
a. excited for a bone, erika told the dog to sit.
b. tired but happy, the dog and erika headed home.
c. the puppy seemed excited to see many large dogs running around the field.
d erika clipped on the dog’s leash, and she headed out the door to the park.

A modifier is a word, phrase, or clause that describes a sentence's other parts.

A misplaced modifier is one that is positioned incorrectly in respect to the word, phrase, or clause it is meant to characterise.

The following is a sentence with a misplaced modifier:

Option A, because the sentence has been misplaced and amended but is still comprehensible.

Other options, such as, are incorrect.

For more information about misplaced modifier refer to the link:

link

Excited for a bone, Ericka told the dog to sit.

Explanation: I got 100% on the test :)

taking into account that a theme is the central topic a text treats and can be developed through a story, play, poem etc. the following are themes that can be further developed:  

my best friend jeffrey has many unusual interests. (the story could be about each of the unususal interests)

once a man gives his soul over to evil, he can never go back. (this could be a saying or a proverb)

the three sheepdogs lay around the yard all day. (it could be developed detailing how each of these sheepdogs lay around)

a priest's collar has an unusual effect upon people. (it could be developed detailing the different effect upon people)

innocence is a powerful force in a world full of corruption. (it could be developed detailing how is a world full of corruption)

king lear is a play shakespeare wrote later. (it is just a sentence and doesnt give any idea or topic to be discussed in details.

evil often wears the disguise of innocence. (this could be a saying or a proverb)

throughout history, economists have always thought  ..