Which fruit is used to make cider?

Cider is an alcoholic beverage made from the fermented juice of apples. The UK has the world's highest per capita consumption, as well as the largest cider-producing companies. Ciders from the South West of England are generally stronger. In the U.S., varieties of fermented cider are often called hard cider to distinguish alcoholic cider from non-alcoholic apple cider or "sweet cider", also made from apples.

Source: Wikipedia