Answer: A. Usability testing
Explanation:
Usability testing would be the correct answer because if the user interface isn't "frendly" then people won't be able to use it properly. Or if you are refering to the word friendly as looking safe, then even more so would be usability testing. Because if people don't like the fonts and styles of the user interface, they might not use it at all.
To rewrite something , but in your own words
Answer:
They make it easy to quickly see relationships between ideas.
Explanation:
A concept is an idea or a principle that could be used to understand an abstract notion. A conceptual note is one that makes the relationship between ideas easily discernible.
Without breaking much sweat or reading too deeply, the reader would find it easier to easily determine the relationship between ideas and how they relate to the subject matter. Conceptual notes can be taken on a laptop or paper.
