as you know squirrels have brown fur and eats nuts and fruits but many squirrels does not hibarnate in winter so the squirrel is not actual answer so chipmunks is the species of animals which have brown fur and eats nuts and fruits and hibarnates in winter.
Berries and nuts are typically fruits and products of trees, and there must be plentiful amount in which to have a population (though it states only an organism, but it can be assumed). Brown fur is typically <em>camo</em> against a brownish background, which can be reflected essentially through bark & wood of trees.
*Most likely the given organism is a squirrel, which typically prefer forest or habitats with trees or tree-like objects.
<span>Both pine trees and ferns have the ability to make their own food via photosynthesis. They are both able to convert water and carbon dioxide into oxygen and sugars. Based on the concept of domains they are both classified under Eukaryota. </span>