Mostly because the Roman empire was a hugely vast empire in time where the internet or any other form of fast communication possibilities didn't exist yet. For this reason, it would be highly unpractical for Rome to rely on having direct democracy and each person giving his vote on every aspect of life.
Answer:
legislature
Explanation:
legislative - makes laws
executive - carriss out laws
judical - evaluate laws
From the experiment, spontaneous recovery was seen when the sound was presented without the food, and then the trial was done again with the food after a long period of time.
Highly motivated individuals would tend to be more persistent than less motivated people in an attempt to reach their common goal. These motivations always come with a source, and such things could either be internal or external wherein an event or a people would drive them to achieve their objectives.