Bison hump and eating habits — Grammar corrected for a 6-year-old

Here are the corrected sentences:

• The hump on a bison's shoulders is a bundle of strong muscles that helps hold its large, heavy head.
• Just like cows, bison walk in groups and bite off grass, shoots, and leaves.

Simple explanation for a 6-year-old:

1. The hump is like a big muscle pillow on the bison's back that supports its heavy head.
2. Bison live together in groups so they can stay safe.
3. They eat plants by biting off grass and small new shoots and leaves.

Quick notes:

• The plural of "bison" is also "bison" (we do not add an "s").
• Use commas in lists: "grass, shoots, and leaves."