In 'A Charlie Brown Christmas', what type of tree does Charlie Brown select?

A little, bare Christmas tree

What do you call animals that only eat meat? In athletics, what are hurdles typically made out of? Who released the 1984 album "Born in the U.S.A."? Who was executed in 1953 as convicted Soviet spies, becoming symbolic victims of Cold War paranoia? Which chess piece moves strictly horizontally or vertically?