Item 4 if the a major scale has three sharps, how many sharps will be in the key signature for a major? four two three one

Because some people view different things to be beautiful. For example, some people like still life paintings and colorless sketches while others might find these to be too bland. Or, some people like poetry and others see it as corny or too dramatic. We all find different things to be aesthetically pleasing just like we view things like music or poetry. Basically, they're just opinions