When might you use connotation in your writing?

when you are trying to persuade
when you are using facts and statistics
when you are writing research reports
when you are trying to explain

A: when you are trying to persuade.

 Connotation might be used in a writing with the purpose to persuade because a word carries a variety of associations and meanings besides the denotation, which is the literal meaning found in the dictionary. The connotative meaning helps create emotions in the reader, and, if the word is chosen correctly, it can be a point in persuasion.

the unsaturated fatty acid is a fat consist of one or more double bond in the fatty acid chain. if it contains one double bond then called as monounsaturated fatty acid however if, it contains more than one bonds called as a polyunsaturated fatty acid. true fatty acids are called unsaturated fatty acids as it reduces the risk of high blood cholesterol and good for health.

i'm thinking it would be when compound subjects are joined by or, nor,either-or, neither-nor.