Beatriz is 2 years old; when her brother tells her to hide, she covers her face with a blanket. this is a good example of:

Egocentrism

From the age between 2-7 years old, a child is in the "preoperational stage" of development, characterized by symbolic representation or thinking and egocentric thinking. The child also tends to plan, perceive, and solve problems based on appearances (e.g. a half cup of water in a wide glass is to him/her smaller in amount compared to the same amount of water in a tall thin glass). 

A good example of the child's egocentric thinking is most apparent before the child enters kindergarten. When a child is told to hide, he/she usually only covers his/her face, because in his/her thinking, "if i can't see you, then you can't see me!" In egocentrism, the child thinks that other people think and perceive the world the way he/she does. 

However, a recent study tried to explain this action of "ineffective hiding" in children as their way of demanding or insisting on reciprocity, and mutual recognition and regard, instead of merely egocentrism (source: https://theconversation.com/young-children-are-terrible-at-hiding-psychologists-have-a-new-theory-why-67979) 

Estúpido vas a la escuela y no te olvides de tomarte una cerveza.

Aunitary state is a form of state where power is concentrated and there is a single center of power that extends its actions throughout the territory of the respective state. this, through its agents and local authorities, delegates of that same central power, and in its majority; it can count on a single legislating apparatus; except for certain exceptions, which legislate for the entire country; a judicial power, which applies the current law to the entire territory of the state and within which a supreme court of justice is established, which has jurisdiction at the national level; a single executive power, that is conformed by all the governors (president, governors, mayors, etc.); and a single political constitution, which governs all the territory and to which all the authorities and inhabitants of the state are subject.a confederation (from the latin: confœderatĭo) consists of the union of states that retain their sovereignty and are governed by certain common laws. initially there was talk of "confederation" in the case of alliances, for this reason the word "confederation" is still used in non-governmental civil society institutions. for this reason, the term confederation is also used to describe any type of organization that combines the authority derived from other semi-autonomous entities. in this case, sports confederations can be cited as some examples. however, the word confederation takes much more relevance when it comes to some permanent alliance of states or some association or association of states.characteristics of a federal government system

  a) written constitution. also known as magna carta and a necessity of the democracies that form federations to regulate the principles by which the government will be governed, because if they had to act without a body of specific laws would produce confrontations.

b) territorial division. federalism is constituted by the division of powers on the geographical basis of each territory.

c) decentralization. in a federal system there is both a central government and units of government lower than the central one, each making decisions regarding the provision of certain public services in their respective geographical jurisdictions.

d) supreme court of justice. to counteract the rigidity of the written constitution, judicial action is required to interpret said constitution and necessary changes can be made.