What food does Caribu eat?

There's no animal called "Caribu". Do you mean Caribou?

Caribou are herbivores and their diet consists mainly of:

* Lichens: A key food source, especially in the winter.

* Grasses and sedges: Important in the summer months.

* Leaves and twigs: Also consumed during the summer.

* Mushrooms and berries: These are seasonal additions to their diet.

Caribou adapt their diet to the availability of food in different seasons and locations. They are known to be very efficient at finding and accessing food, even in harsh environments.