Question

ready. he whispered to himself what his sister sarah had told him: \same music, same steps. just in front of an audience this time, thats all.\what is the most likely reason henry is nervous?he sees someone he knows in the audience.he has always been secretly afraid of clowns.he is worried he doesnt play the piano well enough.he will be performing in front of a crowd for the first time.

Explanation:

The text indicates Henry is about to perform piano in front of an audience, and he is nervous despite repeating his sister's advice about the familiar routine. The most logical reason for his nervousness is anxiety about his own performance quality. The other options are irrelevant: there is no mention of someone he knows in the audience, a fear of clowns, or that this is his first crowd performance.

Answer:

He is worried he doesn't play the piano well enough.