answer: autocracy
Step-by-step explanation:
let's look at our options and what the mean:
autocracy "a system of government by one person with absolute power."
aristocracy "a form of government that places strength in the hands of a small, privileged ruling class."
democracy "a system of government by the whole population or all the eligible members of a state, typically through elected representatives."
our best fitting option would be "autocracy" since the question asks for one person controlling a government and having all the power, and an aristocracy and democracy both have groups in control, when autocracy is the only one with one person in control.
i hope this helps, and have a great day! don't hesitate to ask if you need more help with this specific question! ♥ - eviezoom