Fragment vs. Sentence

I am.

• Sentence :)
• Fragment :(

It is hot.

• Sentence :)
• Fragment :(

Look at the second part in blue.  Then, choose the best answer:
Why should I listen to you.
Because I am your mother.

• Sentence :)
• Fragment :(

I do.

• Sentence :)
• Fragment :(

If it rains.

• Sentence :)
• Fragment :(

While you are talking.

• Sentence :)
• Fragment :(

Look at the second part (in blue).  Then, pick the correct answer.
We will chase him.  If he runs.

• Sentence :)
• Fragment :(

It is.

• Sentence :)
• Fragment :(

Because it is hot.

• Sentence :)
• Fragment :(

Where does the comma go?
If it is hot we will go swimming and then will eat ice cream.

• hot, 
• swimming, 
• no comma needed