Which of the following is an example of a saprophytic organism?

Saprophytic organisms are organisms that obtain their nutrition from dead or decaying organic matter. Fungi are an example of saprophytic organisms, as they are able to decompose dead plant and animal material and recycle nutrients back into the ecosystem.

Algae are not saprophytic because they do not obtain their nutrients from dead or decaying organic matter.

Lions and cows are not saprophytic because they are heterotrophic organisms that obtain their nutrients from other living organisms. Lions are carnivorous and feed on other animals, while cows are herbivorous and feed on plant material. 

Therefore, the correct answer is "fungi."