Discussion
Identify the odd option from among the following.
Answer: C
Nematodes is the odd one out. Cold and frost, heat and salinity are all abiotic stresses, that is, non-living physical or chemical factors that harm plants. Nematodes are tiny worms that parasitise plants, so they are a biotic stress caused by living organisms. Abiotic factors are the non-living physical and chemical conditions, such as temperature, salt content and water, while biotic factors are the living organisms. Because three options are of the first kind and one is of the second kind, the odd one is the biotic factor.
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