Answer:
<u>Simple sentence:</u>
My ears are going to get pierced.
<u>I’m not sure if this is a compoun-complex sentence or not</u>
I am so excited, but I am also a little scared.
<u>Complex sentence:</u>
I let go off my mom's hand, which took a lot of courage.
<u>Compound sentence:</u>
I sit on the chair and waited for my ears to get pierced, and I felt like an adult!