Why do find more grazers in the prairie? There are unlimited amount of water in the prairie.
There is more space in the prairie.
There is more sunlight available in the prairie.
The most abundant food source in the prairie is grass.

there is more sunlight

Explanation:

New shoots find it harder to take in sunlight, while the ground stays cold and insulating causing a delay in the spring plant growth. Nutrients are locked up in plants yet to decay. Grazers such as bison and cattle, expend more energy foraging, as they pick the nutritious new foliage from around the dead.

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