I noticed that you had already asked quite a few musical theory questions before, and just left them hanging there.
What would be handy to now is why you are asking these questions. Is it for an assignment? A thesis?
The questions relate heavily to musical theory, and while many HR members here are well-versed in musical theory, it doesn't strike me as the logical place to ask this type of question.
Additionally, there are plenty of sites that deal specifically with musical theory and where you can learn to your heart's content
Here, for example:
Music Theory Forum
This is what I sadi in a reply to an earier question of yours. It is relevant here:
"Music has a number of similarities to language, and just as language has its grammar, so does music.
"The most significant thing though, is that they are both oral expressions of oral traditions with oral origins, where, in the case of music, 'oral' includes voice, but also the sound of things being hit, scraped or blown.
"Grammar is the way in which we attempt to impose a framework over these traditions so that we can understand how and why they work. Humans seem to have an innate ability to string vocal sounds together (i.e. words) in a way that others will understand and can respond to, even though in different regions the words will be different and strung together in different ways.
"Similarly, humans can consistently favour a set of musical pitches where these pitches have a particular relationship with each other. Like language, the pitches and their relationships will vary according to region and culture. These do not need to be explicitly taught, but are often passed on through oral traditions."
Scales weren't "made" with any specific function in mind. They are simply a set of notes whose relationship to each other is satisfying to humans (noting that 'satisfaction' varies with culture, and that different cultures will prefer scales with different relationships).
A chord is only two or more notes played together, and has no particular function other than that given to it by the composer. In western scales, some chords are used in particular ways because of the tonal characteristics of the notes of the chord (e.g. a suspended chord seems to want to resolve itself).