GMAT Sentence Correction (SC) | Sentence Structure

Sentence structure

The dictionary definition of a simple sentence as per dictionary.com is said to be the one having a single main clause with a complete thought.

However, according to the link cited beneath, the sentence below is said to be a simple sentence in spite that there are at least eight different complete and equal thoughts expressed by eight verbs.
<https://www.thoughtco.com/identifying-sentences-by-structure-1692194>
The animals snarled and screeched and growled and whinnied and whimpered and hooted and howled and gobbled up the whole ice cream stand.
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