Xia dynasty,Shang dynasty, Qin dynasty, wei dynasty, Tang Dynasty
D- it allows people to protest in public against the government
Wood being softer than coal is a physical property. Any chemical property has to deal with a change in somethings composition. When would is burnt, rotted, or not rusted, it is because there is some form of chemical reaction (Or lack thereof) inside of the wood. The property of being softer, however, does not come about by changing what wood is.