Certain species of which one of the following organisms are well known as cultivators of fungi?

- Ants are well-known as cultivators of fungi. Certain ant species, particularly those in the tribe Attini, have evolved a symbiotic relationship with specific fungi. These ants cultivate the fungus within their nests, providing it with food and a controlled environment. In return, the fungus provides the ants with nutrients. This is a fascinating example of mutualism in nature.

- Cockroaches are omnivores and scavengers. They do not cultivate fungi.

- Crabs are primarily scavengers or predators. They are not known to cultivate fungi.

- Spiders are predators and capture their prey (insects) in webs. They do not cultivate fungi.