A student in an ancient history class brough in a coin marked 453 BC. the coin was passed among the members of the class, who were quite excited over handling a piece of money that seemed so old. suddenly one member of the class held out the coin and shouted "it's a fake". after a brief discussion, the entire class agreed. how did the class member know that the coin was a fake? PLEASE ANSWER

Atown located beside a river derives a large percentage of its revenues each year from the local logging industry. however, heavy traffic to and from the logging sites has increased pollution and contributed to soil erosion. this has also resulted in the loss of native bird species in the logged forests. which of the following is the most sustainable solution to this problem? protecting certain forested areas to allow the birds to recover relocating the equipment and vehicles to new forests for logging relocating the birds to new forests away from the town introducing new bird species to replace the species that have been lost reducing the number of trucks traveling through the forest by 10 percent