just my observation about a glass jar w/a green lid

If you have a glass jar with a green lid and your friend asks you, "why does that have a green lid?", do you answer: "because it's green."or "because it's a glass jar."or "because it's a lid on a jar.".
None of these answers are answers to the question that was asked. An answer that would be likely to be satisfactory might be "because it was painted green.". But that is more of an answer that would be used to satisfy a child. A more detailed answer would be (for ex.) "because it was painted green and the reason it was painted green, was because they did a series of tests to see which color would make the jar more appealing to people, sothat they would buy it.", which would most likely also be a satisfactory answer for an adult.