Answer:
Definitely formal English as formal English is used in formal settings. Both the examples you gave are formal settings.
The denotative meaning of the phrase snake in the grass as it is used in the sentence is; a limbless reptile slithering in the lawn.
<h3>What is Denotative meaning?</h3>
Denotation otherwise termed the Denotative meaning of a word or phrase is the literal definition of such word or phrase. For instance, the denotation for red is the color red.
On this note, it follows that the Denotative meaning of the phrase, snake in the grass is; a limbless reptile slithering in the lawn.
Read more on Denotative meaning;
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