Answer: the color wheel is useful because it shows and (sometimes) tells you what colors are.
Secondary colors are the colors you get when you mix two primary colors together, red and blue make purple, red and yellow make orange, and yellow and blue make green. Complementary colors are opposite each other on the color wheel, red and green, orange and blue, and yellow and purple.
to put it simply yes, paint and crayons together would be multimedia, no digital art needed
A1) In movies that include animals, its not always possible to get real trained animals or even untrained ones to behave how the directors want them to. So CGI enables non-human characters to act the way we want them to.
A2) In fantasy movies, we know that almost all the things are not scientifically possible. And due to that, its not possible to create such fantastical scenes in real life. CGI allows us to bring human imagination to life, even though its scientifically impossible.
It will give you experience in the digital art workforce
I hope this helps