Correct Answer: Symbol

Solution : The correct choice is the second option.

An emblem is a symbol or representation that signifies a concept, idea, or quality. It is often a visual representation that carries meaning. A symbol is a sign or representation that stands for something else, often with a deeper or abstract meaning. In the context of the options, "Symbol" aligns closely with the meaning of "Emblem".

The meanings of the other options are as follows:

• Refinement: It is the process of improving or making something more polished and cultured.
• Problem: It is a difficult situation or condition that requires a solution.
• Expression: It means conveying thoughts, feelings, or ideas through words, actions, or other forms of communication.

Therefore, the correct answer is symbol.