<span>When analyzing the components that allow individuals to think in a more clear and effective manner, perhaps the foremost concept that explains this phenomenon is that synaptic pruning, as the brain and synapses work towards ensuring only the necessary things are thought about.</span>
The correct answer is <span>social stratification.
Social </span><span>stratification refers to the ranking of people in society on a hierarchical basis, based on factors such as power, prestige and wealth. Through the system of social stratification, some members of society at the top of the hierarchy are considered as having a higher status and more privilege compared to those who rank lower on the hierarchy. </span>
<span>D. In a planned economy, the factors of production are held exclusively by the State authority. In contrast, a market economy (A) allows for private enterprise while a mixed economy (B) has parts of both a market and a planned economy, and is the major form that most western nations use. An open economy (C) is the form used by countries that allows for imports and exports of goods and services.</span>
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