What is a young horse called?

Foal

Which actor portrayed Freddie Mercury in the biopic "Bohemian Rhapsody"? Who portrayed Black Panther/T'Challa in the Marvel Cinematic Universe? Which American singer was known as the 'Empress of the Blues'? Which created structure symbolized American engineering during the Great Depression and is located on the border of Arizona and Nevada? What is the tallest species of giraffe?