Mother Necessity

What is the phrase “Necessity is the mother of invention” means?
I have 3 ideas what this phrase means.

First of all, I think necessity is the mother of invention because, mother
is the person who gives birth to the inventors. Every inventors are born from their
mother, and if mother didn’t born a baby, the invention haven’t occurred.

Secondly, mother is the person who does the nourish. Mother works very
hard to make the child grew healthy, and well educate. For example, Edison, who invented
light bulbs and electricity, his mother nourished Edison with very deep love. She didn’t let him go to school, because there was bad influence, (Bad words, fightings) so she spent most of the time Edison teaching. She worked hard on Edison’s education and that made Edison a great person.

Finally, mother keeps the house. They cook, wash the cloths, make bed, clean the room…..
they do many things. And at the old time there was many hard time doing does, such as washing.Because there wasn’t washing machines, so they washed it with their hand. But now there is a washing machine so everyone can wash the cloths easily. But who invent the washing machine? Most of the inventors, invented things from watching mother having a hard time. So mother’s hard time caused the many inventions.