Step 1: Understand the meaning of the sentence.
The question asks for the word used for a person who gives importance to practical results and real-life usefulness. Such a person focuses more on what works in practice than on theories or abstract ideas.
Step 2: Analyze the options.
A plagiarist is a person who copies someone else's work and presents it as their own. This does not fit the meaning of the question.
A realist is a person who sees things as they really are, but this word does not directly mean someone concerned with practical results and values.
A pragmatist is a person who deals with problems in a practical and sensible way, focusing on results and usefulness. This matches the given meaning exactly.
A fundamentalist is a person who strongly follows fixed beliefs or traditional doctrines. This is unrelated to practical results.
Step 3: Conclusion.
Therefore, the correct word for a person concerned with practical results and values is pragmatist.