Which animator joined Disney in 1933 and contributed to the animation of the vultures in The Jungle Book?

The correct choice is Eric Larson, who joined Disney in 1933 and played a significant role in the animation of the vultures in "The Jungle Book." Larson was one of Disney's Nine Old Men, a group of highly influential animators who contributed to many of the studio's classic films. His expertise in character animation and understanding of movement were critical in bringing the vultures to life, resulting in a memorable and iconic portrayal that contributed to the film's appeal.

The other animators listed made important contributions to various Disney projects, but they were not specifically tied to the animation of the vultures in "The Jungle Book." Frank Thomas and John Lounsbery, while also part of the Nine Old Men, had different focuses within the Disney oeuvre and were involved in various other significant films and characters. Wolfgang Reitherman, too, had a notable career with Disney, but his contributions were more aligned with directing and overseeing sequences in films rather than animating the vultures in this particular work. Understanding Eric Larson's distinct role in the creation of the vultures helps to clarify the significance of his contributions to Disney's animation legacy.