Lewis wrote an informational academic paper about deer. He rereads his work and is starting to revise for academic voice.

Which sentence needs to be revised for an academic voice?

The buck, or male deer, is a noble animal that has great speed.
Deer enjoy corn, but they get most of their nutrition from grass.
Some people think they can tame deer, but I just don’t buy it.
Deer tend to be extremely nervous and dash away when startled.