The melting temperature of materials is affected by the pressure they are under. So when "rock" in the Earth's mantle experiences a decrease in confining pressure, not only does it expand, it's melting temperature drops. If the melting temperature of the material drops below the background (also known as the in-situ ) temperature, then melting will occur and in this case magma will form.
She inherited the hair color from only her mother because she has blonde hair like her mom and not her dad if she had gotten brown her then it would be from her dad but that’s not the case so she inherited from her mother
