Final answer:
The 'FFA' emblem and letters are protected through trademark registration which identifies and distinguishes the organization's brand and prevents unauthorized use.
Step-by-step explanation:
The emblem and letters "FFA" are protected by trademark registration. A trademark is a type of intellectual property protection granted to symbols, words, or a combination of both that legally identifies and distinguishes a company's or product's brand from others. This legal registration helps to prevent the unauthorized use or replication of the FFA brand, ensuring that the organization's identity and reputation are safeguarded. Trademark registration provides legal protection to the owner, preventing others from using or imitating the protected emblem or letters without permission.