An example of mutualism in the Coniferous Forest is between squirrels and trees. Squirrels take shelter within the trees, and get food and protection, while the tree gets it's seeds spread around and new trees can now grow due to the spreading done by the squirrels. And example of Commensalism is deer living within the forest. The forest is the deer's home, and provides the deer with a place to live and food within the forest, but the deer does not really give anything in return; it simply lives there. An example of parisitism would be a tick and a deer, or any other mammal for that matter - the tick gains food from the mammal's blood, and can survive thanks to that, whereas the mammal it's connected to loses blood and can get sick from the tick taking their blood. And finally, an example of competition would be between deer and elk. Both eat grasses and plants, and since both eat them, the resources go to both of them. If the resources grew to be very limited, then elk and deer would have to compete to get their food to survive.