Final answer:
The sentence provided is a literal statement and does not demonstrate the use of figurative language. It simply depicts that the children are chewing with their mouths open, contrary to their mother's warnings.
Step-by-step explanation:
The sentence 'Despite their mother's warnings, the children chose to chew with their mouths open' does not contain a figurative language element. It is a straightforward statement presenting the fact that the children are chewing with their mouths open, ignoring their mother's advice.
Figurative language involves using figures of speech like metaphors, similes, personification, and hyperbole, which are not present in this sentence. The sentence is literal and describes the children's action directly without the use of figurative language.