<span>When two variables move in the same direction, the curve relating them is
upward sloping, and we say the variables are positively related.
Refer to the attached graph for an explanation. Here we have the measure of armspan on the X-axis and height on the Y-axis.
The graph is upward sloping because as the measurement of armspan increases (on the X-axis), so does the measurement of height (on the Y-axis). Therefore, it can be said that armspan and height are positively related as an increase in one of them results in an increase in the other. </span><span>
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They avoid being detected because this would throw off the behavior patterns that exist naturally and they don't want their presence being known since this might throw it off.<span />
Which country you are reffring to ? please elaborte
The Renaissance movement began in Italy and spread to other European nations from 1500 to 1688. Renaissance writers became inspired on the works produced by the Romans and Greeks during the ancient world. Renaissance writers believed that the arts, literature, learning and politics had flourished during the ancient times, and now they were reborn after the dark Middle Ages. In addition, the writers of the Renaissance reflected on their works a spirit of inquiry and exploration about the world, using the Greek and Roman writing styles as model.