Please help me im in a unit test Read this paragraph.

The red velvet stage curtain opened and a packed audience of onlookers gazed at me. The stage lights were blinding. I slowly walked up to the white masking tape line on the black stage floor. The first bold piano notes filled the room. I took a deep breath and debuted my singing voice to the crowd.

Which of these choices is an example of a sensory detail?

onlookers gazed at me
I slowly walked
the first bold piano notes
to the crowd