Final answer:
Concrete expressions provide the receiver with greater information and create a clearer understanding in verbal communication.
Step-by-step explanation:
Concrete expressions in the context of a verbal message refer to words or phrases that represent specific, tangible objects or actions that can be experienced through the senses. These expressions provide the receiver of the message with more detailed and specific information compared to abstract expressions. They help create a clearer image or understanding of the message being communicated. For example, instead of using the abstract word 'happiness,' one can use a concrete expression like 'sparkling laughter' or 'bright smile' to convey the same idea in a more vivid and tangible way.