What are the ways in which mushrooms, tigers, banyan trees, cows, and humans obtain nutrition differently?

The selection of organisms in this question is important because they all fall into separate categories. Obviously the mushroom is not an animal but a form of fungus. The tiger is a carnivore, the human is an omnivore, and the cow is an herbivore.
The mushroom feasts on decay. Because it can't move, it absorbs nutrients from nearby rotting dead plants. As the nutrients soak into the soil, the mushroom consumes them.
The tiger, a carnivore, eats meat. Meat is highly processed energy—having been eaten by something else and turned into muscle—so the tiger gets a large amount of energy very quickly but with a lot of work.
The cow, on the other hand, is an herbivore and grazes on the grass to feed, slowly taking in raw energy from the plants and converting it to fat and muscle.
Finally, the human is an omnivore, which is a combination of herbivore and carnivore. The human can eat plants and meat and has complex internal systems capable of transforming them both into usable energy.