The statue of liberty is made out of copper and was ones shiny and copper colored. over the years, the copper has gone through a process called oxidation, where it has changed into a new material. what has occurred?

Gymnast always perform on padded mats. how does the mats protect the gymnast

May someone me with these science questions

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?