Answer:
A) "Yikes! It's a snake! Run and get dad!" Harry yelled fearfully.
Explanation:
This option shows Henry yelling for help when he sees the snake. Him yelling to get his father conveys fear, and it states that he is fearful after the dialogue.
The sentence that combines the two sentences using a present participial phrase is B) Stretching eight feet, the sunflower reaches all the way up to my window.
This is the only sentence where you can find the present participial phrase - <em>stretching eight feet. </em>
I believe the answer is B.