To determine the legal right Arushi needs to secure exclusive control over her new energy-efficient LED light invention, we must understand the various types of intellectual property rights:
- Copyright: This right protects original works of authorship such as literary, dramatic, musical, and certain other artistic works. It does not apply to inventions.
- Trademark: This protects brand names, slogans, and logos that distinguish goods or services. Again, it is not applicable to inventions.
- Patent: This right is specifically designed to protect inventions, granting the inventor exclusive rights to make, use, and sell the invention for a certain period, usually 20 years from the filing date. This is suitable for Arushi's LED light invention as it is a new product.
- Plagiarism: This is not a legal right but an unethical practice of using someone else's work or ideas as your own without proper acknowledgment.
Given the context and definitions, the appropriate legal right Arushi should obtain is a patent. This will ensure her exclusive control over the commercialization and use of the LED light for a limited period, protecting it from being copied by others without her permission.
Therefore, the correct answer is Patent.