Answer:
The design principle of emphasis
Explanation:
Some of the importance of user interface are:
- It helps to meet user expectations
- It helps to support the effective functionality of a site.
- It enables effective interaction between the user and the program
The different UI are:
- Command Line Interface.
- Menu-driven Interface.
- Graphical User Interface.
- Touchscreen Graphical User Interface.
<h3>What is a User Interface?</h3>
This refers to the process in which designers use to build interfaces in software or computerized devices, focusing on looks or style
Hence, we can see that Some of the importance of user interface is given above.
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Guido d'arezzo contributed to the development of musical notation. Option B. This is further explained below.
Who is Guido d'arezzo ?
Generally, Guido d'arezzo aka Guido d'Arezzo, was an Italian High Medieval music theorist and educator who lived from from 991 to 1033.
In conclusion, He was a Benedictine monk who is widely recognized as the creator of the current staff notation, which profoundly impacted the evolution of Western musical notation and practice.
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