Worms, caterpillars, and ants are various species that belong to different genera but may have the same family. Their study comes under the biological species. Thus, option B is correct.
What are biological species?
Biological species are organisms that reproduce and give rise to offspring. The word was defined by Ernst Mayr. They have characteristic features determined by fertile and healthy offspring.
Only the organism that can interbreed and produce fertile progenies is considered a species. They share the most common traits and attributes that make them different from other organisms.
A few examples of species are ants, caterpillars, earthworms, cockroaches, etc. They can interbreed but can't reproduce with one another as it is less favorable and may produce infertile organisms.
Therefore, the biological species observe the ants, worms, etc.
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