Maybe your father is a hair stylist. All he does is color and style hair all day. But you have a house, clothes, and everything else, none of which you personally have to make for yourselves. It also means that we invest in equipment and machines that do specific things that increase our productivity. The second determinate of productivity is capital accumulation.
Capital accumulation means adding to our capital stock.
Our capital stock refers to machines and other capital equipment, which increase our productivity. With more capital, people can produce more. The result is more goods and services to consume. The production possibilities curve is a diagram that shows the idea that, if we want more of one good, we have to give up some of another. The costs of something increase as we try to produce more of it.