According to , the presence or absence of certain experiences is especially important during specific time frames called critical periods.

ethologists

Explanation: Ethologists study the character or fundamental values of a person, people, culture, or movement—human and animal behaviours. According to them, a critical period critical period is a phase in the life span of an organism during which there is heightened sensitivity to external stimuli that are compulsory for the development of a particular skill. This is due to the fact that an individual's behavioral characteristics can be more strongly influenced by some stimulus at one stage of development than at other stages. As such for some reason, if the individual does not receive the appropriate stimulus during this time to learn a given skill or trait, it may be difficult, less successful, or most times even impossible, to develop certain associated functions later in life—functions that are indispensable to its survival.

answer; the confederacy could afford to move a large number of prisoners hundreds of miles but could not afford to fee and house the prisoners;

the federal government of the united states was established by the constitution. us is a presidential republic. the president is head of state, head of government and of a two party legislative and electoral system. the supreme court balances the powers of the federal and the state government. yhe executive branch is headed by the oresident. there are two chambers of congress, the senate and the house of representatives. judicial power is exercised by the judicial branch (or judiciary), comprised of the supreme court and lower federal courts. the judiciary's function is to interpret the   constitution as well as the federal laws and regulations.