Mother Necessity

What does the phrase, “Necessity is the mother of invention” mean? Please include at least three good examples to support your thinking.

I think “Necessity is the mother of invention” could mean a look of things. My first idea was that when something is necessary that it becomes a priority to invent it. For example, the telephone, in the old days it would take days and maybe even weeks to get a telegram from one place to another. Now, thanks to Mr. Bell all we have to do is pick up the phone, dial in a number, and hope it’s not busy. Another example is the sewing machine. The sewing machine helped the public produce clothes in a much quicker fashion. My last example is the plane. When people wanted to get from England to America it would take weeks on boat. Now that the plane is very advanced it only takes about seven hours. So as you can tell when something becomes a necessity it is invented therefore saying “Necessity is the mother of invention.