At approximately what age do boys and girls understand the concept of gender constancy?

Which statement best explains “the culture of life” (plato) plz : ( a. it is the belief that all life is sacred and the implementation of policy in line with that vision b. it is the idea that human embryos should be used to find cures to medical conditions c.it is the belief that god created the world and that no one should a metal in affairs of life and death d. it is the belief that human beings have the right to determine when and how they should die

Black death spread because of what problem in medieval europe? which one is it i need the answer quick . a- overcrowded cities b-too many farm animals c-not enough qualified doctors d-all of the above

What statement shows that the agreement between the fictional nations of ziberia and deerkey is a free trade agreement?