Read the paragraph and answer the Question given below:

There is no natural habitat on earth known that is inhabited just by a single species. For any species, the minimal requirement is one more species on which it can feed. Even a plant species, which makes its own food, cannot survive alone and needs soil microbes to break down the organic matter in soil and return the inorganic nutrients for absorption. It is obvious that in nature, animals, plants and microbes do not and cannot live in isolation but interact in various ways to form a biological community.

Which of the following set of organisms is an example of commensalism?

Sea anemone and clown fish

The correct answer is Option (3) → Sea anemone and clown fish

Commensalism refers to an interaction between species where one species benefits while the other is neither harmed nor benefited.
For instance, an orchid growing as an epiphyte on a mango branch and barnacles growing on the back of a whale both derive benefits, while the mango tree and the whale do not appear to be affected positively or negatively.

Another example of commensalism is observed in the relationship between cattle egrets and grazing cattle. In farmed rural areas, these birds can often be seen foraging near grazing cattle. The egrets take advantage of the insects stirred up and flushed out by the cattle as they move, making it easier for the birds to find and capture their prey.

The cattle, however, are not affected by the presence of the egrets. Similarly, the interaction between sea anemones and clownfish demonstrates commensalism. The clownfish find protection among the anemone's stinging tentacles, which deter potential predators. The anemone does not seem to derive any apparent benefit from hosting the clownfish.