Strong winds enter the house through the open door, and the husband tells the wife to "Gae [go] out and bar the door."
She, in summary, tells him to forget it. She's the one who is busy working, not him.
They make a pact that whoever speaks first will be the one to have to close and bar the door. They are both stubborn, and stubbornness is really what the poem is about. You could say stubbornness is the theme of the poem.
Gravity causes the raindrop to accelerate to the ground at a rate of 10m/s². However, air friction acts against this gravitational acceleration by reducing the rate of acceleration of the raindrops. The higher the friction surface of the raindrops the lower the terminal velocity.
Scientific Law, A rule of nature.
Uhhhh it i think its flowers according to bio