'Vassals were the lowest class in the newly established government system's hierarchy.
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What is hierarchy?</h3>
A hierarchy is an arrangement of items (objects, names, values, categories, and so on). Hierarchy is a key concept in many disciplines, including architecture, philosophy, design, mathematics, computer science, organizational theory, systems theory, systematic biology, and social sciences.
A hierarchy can connect entities directly or indirectly, and it can connect entities vertically or diagonally. In a hierarchical system, the only direct links are to one's immediate superior or to one of one's subordinates, though a largely hierarchical system can also incorporate alternative hierarchies. Hierarchical links can extend "vertically" upwards or downwards by following a path with multiple links in the same direction.
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Answer: • Birds have feathers covering their bodies while other animals do not have feathers. • The sharp beak without teeth is another characteristic to the birds but not to all the animals. • Except for mammals, birds are the only other group of animals who maintain warm-blooded metabolic activity.
Explanation: Hope this helps :)
The answer is b
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<span>A circuit involving the insula, the anterior cingulate cortex, and the: Amygdala
</span><span>seems to play a role in complex social decision making, such as deciding whom to trust. Amygdala is the part of our brain that controls the emotion fear. Our decision to trust a person or not is based on the fear to be betrayed and endanger everyone that we love.</span>
3. a bear hibernating in winter
