. The basic smallest unit of classification is

Best Answer

Explanation-

Taxonomy is the branch of biology that deals with the classification of living organisms into a taxonomical hierarchy. Carolus Linnaeus is known as the Father of Taxonomy-

The taxonomical hierarchy includes- 

For Plantae 

Kingdom (Highest category)                                              

↓

Division/Phylum (Classes having common characters comes under the same division/phylum)

↓

Class (Orders with similar characters are placed under the same class)

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Order (Families having common characters forms the order)

↓

Family (Genera having common characters forms the family)

↓

Genus (Group of closely-related species) 

↓

Species (smallest unit of classification)

Final Answer-

So, The correct option is A.

The basic smallest unit of classification is-Species.