Step 1: Understanding ergonomics.
Ergonomics is the branch of science that focuses on designing and arranging workplaces, products, and systems to optimize the well-being and efficiency of the people who use them.
Step 2: Evaluate each option.
- Option 1: Netiquette: Netiquette refers to the set of conventions for communicating on the internet, not related to workplace design.
- Option 2: Ergonomics: This is the correct answer. Ergonomics aims to improve comfort, productivity, and safety in the workplace.
- Option 3: Leeching: Leeching is unrelated to workplace design. It refers to the extraction of resources or benefits without giving anything in return.
- Option 4: Refurbishing: Refurbishing refers to the process of renovating or restoring, not specifically related to designing or arranging workplaces.
Step 3: Conclusion.
The correct branch of science that deals with the design and arrangement of workplaces is ergonomics.
Final Answer:
\[
\boxed{\text{Ergonomics is the branch of science that deals with designing and arranging workplaces.}}
\]