Final answer:
The phrase "on the other hand" is a contrast transition that highlights alternative perspectives or differences between two ideas.
Step-by-step explanation:
The phrase "on the other hand" is an example of a contrast transition. This type of transition indicates a shift to an opposing or differing point of view, idea, concept, or argument. It is used to juxtapose two different ideas or statements, allowing the writer to present an alternative perspective or to highlight differences. Other examples of contrast transitions include words and phrases like "however", "nevertheless", and "on the contrary". They play a critical role in writing, making it clearer and more cohesive by showing the relationships between various points or arguments.