Answer:
screen resolution
Explanation:
The screen resolution indicates the number of pixels that can be displayed at one time on a given screen. For example, it could be numbers like 1920x1080, 1600x900 and so on.
Viewing angle has nothing with the pixel count, although viewing port would. Color depth concerns the number of colors you can display at one time. Pixel density is the concentration of pixels, like in Apple's retina display, that increases the number of pixels in the screen, but that doesn't give you the information on how many there are.
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Typically, when someone refers to a community resource, they mean an organization that serves a particular geographical area or group of people by providing tools to help that community grow in positive ways and improve the quality of life for the people of that community.
Making a prototype is a great example of double checking. A prototype is the first made, which means it'll be tested. If a prototype was untested when complete, then it would be exceptionally harder to determine that everything is in working condition. No matter how skilled someone is.
In fact, skilled workers would prefer to test their prototypes to make sure it works. That way they'd stay on top.
