The lines represent how time passes differently. The solid line is the slow changing of the earth overtime, the middle is the evolution of plants and animals and the slower, less complicated way they live compared to humans, and the top line is how humans live such fast paced lives. The woman is rooted on the solid line but is affected by the others. She reaches for whatever she can accomplish in her lifetime. She could also be running through life or treting her life like a balancing act. Humans all live in different ways.