Answer:
The energy of a mechanical wave can travel only through matter. The matter through which the wave travels is called the medium (plural, media). The medium in the water wave pictured above is water, a liquid.
Answer:
https://www.hrw.org/report/2020/09/17/they-have-robbed-me-my-life/xenophobic-violence-against-non-nationals-south
The law of supply is the microeconomic law that states that, all other factors being equal, as the price of a good or service increases, the quantity of goods or services that suppliers offer will increase, and vice versa.
If a bread is free (zero), the producer will not sell any of it. However, as the price goes up, more loaves of bread are sold in the market
If the the price of a particular good is high, the quantity supplied or the amount of that producers would be willing to sell will also be high.