Topic: Substitution, Expression, & Definition,

Best Answer Explained in Below-:

The term "impostor" specifically refers to someone who assumes a false identity or pretends to be someone else, often with the intention of deceiving others for personal gain or to avoid detection. In the context of the given question, an impostor is someone who deliberately presents themselves as someone they are not, which aligns perfectly with the provided definition.

While options like "rogue" and "liar" do imply aspects of deceit, they don't capture the specific act of assuming a different identity. A rogue typically refers to someone who is dishonest or untrustworthy but doesn’t necessarily involve impersonation. Similarly, a liar is someone who tells falsehoods, yet this term does not encompass the broader act of adopting a different persona or identity.

On the other hand, a "magician" performs tricks and illusions, often using deception, but their goal is entertainment rather than impersonation for personal gain. Therefore, "impostor" stands out as the most accurate choice, as it encapsulates the act of pretending to be someone else, highlighting the element of deception intrinsic to the word.