The answer is: Market
In the market model, each indviduals have the chance to predict the type of product that the majority of people need / desire. (which they commonly called as 'market demand').
After knowing the market demand, individuals who want to obtain an economic profit need to develop the products in order to answer the market demand. (products that given to the consumers by the sellers is what usually called as market supply)
Answer: He controlled the gold supply. The gold supply and trade routes shifted eastward. The kings of Mali from 1076 to 1332 A.D. were brutal rulers.
Explanation:
Towards the beginning of the story Matilda walks to the public library that is located near the market place. Matilda is brilliant and sensitive. She can speak like an adult. She teaches herself to read by age of three, but her parents, Mr. and Mrs. Wormwood, didn’t noticed that she is special. There were very few books in Matilda’s home, so she asks her father if he would buy her one. He tells Matilda that she should watch TV instead.
Hence at The library the librarian, Mrs. Phelps, is concerned by Matilda’s age and lack of supervision, but does not interfere. Matilda reads through all of the children’s books and asks for a good, famous book that adults read. Mrs. Phelps gives Matilda Great Expectations. After finishing it, Matilda reads other classic novels. Mrs. Phelps shows Matilda how to check out books from the library, so that Matilda only must return once a week.
To learn more about Matilda here
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