Which Disney film features the song "Under the Sea"?

In which Pixar film does an old man tie balloons to his house? Which Pixar film is set around the Mexican holiday Día de los Muertos? Which Disney film features the song "Let It Go"? Which Disney film features the song "We Don't Talk About Bruno"? Which Disney film features the song "Be Our Guest"? Which Disney film features the song "A Whole New World"? Which Disney film features the song "Circle of Life"? What was Walt Disney's first full-length animated feature film?