Lets stop these hiccups

Kutu and Ki are playing when Kutu gets hiccups. He tries various remedies like eating a banana upside down and drinking water, but nothing works. Papa suggests holding his breath, but the hiccups persist. Ma cleverly scares the hiccups away by pretending there's a spider on Kutu. She then explains that hiccups are caused by the diaphragm twitching, which can happen for various reasons. Finally, Minku gets the hiccups, and the cycle continues.

What explanation does Ma give about why we get hiccups?

What are some reasons mentioned for why hiccups can occur?