I think it’s the b because they had feudalism in that period during the fifth century when kingdom s begin to become units of government
el flujo de energía a través de la biosfera es en un solo sentido. La energía radiante del sol es interceptada por la biosfera. Después de pasar a través de las transformaciones que mantienen vivos a los organismos retorna al espacio exterior en forma de calor. De esta manera no hay "ciclo de energía".
The constitution's preamble, beginning with the words "we the people," is an illustration of <u>"popular sovereignty"</u>.
Popular sovereignty, or otherwise known as sovereignty of the peoples' rule, is the rule that the power of a state and its administration is made and supported by the assent of its nationals, through their chosen delegates, who are the wellspring of all political power.