In 'A Charlie Brown Christmas', which kind of tree is Charlie Brown persuaded to buy?

A small, sparse tree

Which animals communicate with each other using infrasound frequencies humans cannot hear? How many sides does an octagon have? What famous American poet wrote the poem 'A Visit from St. Nicholas' commonly known as 'The Night Before Christmas'? What legendary blues musician was famous for his guitar "Lucille"? In astronomy, what is a shooting star?