Which communication technique involves making an implied comparison?

The correct answer is metaphor. A metaphor involves making an implied comparison between two unlike things without using "like" or "as," which distinguishes it from similes that make explicit comparisons. This technique allows speakers to convey ideas and emotions more vividly by suggesting that one thing embodies characteristics of another. For example, saying "time is a thief" suggests that time steals moments from us, creating a stronger emotional resonance than a straightforward description.

In contrast, denotation refers to the primary, literal meaning of a word, lacking the figurative implications that a metaphor offers. Techne pertains to the art or skill involved in practice and does not relate to the figurative language in communication. Gesturing involves using body language to accompany speech, which can enhance communication but does not inherently involve making comparisons. Thus, metaphor is the specific technique that aligns with the requirement of making an implied comparison.