Western European nations maintained democratic political systems.
The answer is B) Inca. Extensive road network across plains, deserts and mountains reaching all corners of the empire was one of the notable features of the Inca empire like terraced farming, canals, crop rotation and irrigation as agricultural innovations. It allowed smooth military operations, trading, and the use of runners or chasquis.
The correct answer is C. There is a large amount of rain or snow in the air.
Explanation
According to the fragment of the question that states that "To use a radar, a weather tower sends out radio waves and then detects the waves that are reflected back to the tower" it is possible to infer that the radar waves that are reflected towards the tower They are the product of the collision of these waves with an object that is in the air such as rain. Therefore, in the case in which a large number of radio waves are reflected towards the tower in a particular area, it can be said that this is due to a large number of objects in the air in this area such as rain or snow. So the correct answer is C. There is a large amount of rain or snow in the air.
Answer:
FALSE
Explanation:
The freshwater refers to all the naturally occurring water on the earth's surface such as rivers, streams, lakes, and glaciers. It does not include the sea and ocean water bodies.
This freshwater plays an important role in supporting the various life forms on earth as well as the ecosystem. Only about 3% of the total water present on the earth is freshwater.
This freshwater is affected by human activities very significantly. The rivers, streams, and lakes are constantly being polluted due to the following reasons such as the toxic chemicals released from the factories and industries mixes with the river, addition of fecal waste and solid waste materials to the water, thereby making the water unsuitable for drinking and other purposes.
Thus, the freshwater present in the world is constantly being degraded and decreasing.
Hence, the above-given statement is False.
The earth's crust is very important to human beings not only because they live in it but because of the socio-economic benefits it offers them. ... Some of these less dense rocks, such as granite, are common in the continental crust but rare to absent in the oceanic crust. Both the continental and oceanic crust mantle.
