What is the scientific name of humans?

Which of the following statements are not correct?
$(i)$ Lower the taxon,more are the characteristics that the members within the taxon share.
$(ii)$ Order is the assemblage of genera which exhibit a few similar characters.
$(iii)$ $Cat$ and $dog$ are included in the same family Felidae.
$(iv)$ Binomial nomenclature was introduced by Carolus Linnaeus.

Which category comes after phylum in descending order in taxonomic hierarchy?

What is a $Taxon$?

Define a taxon. What is meant by taxonomic hierarchy? Give a flow diagram from the lowest to highest category for a plant and an animal. What happens to the number of individuals and the number of shared characters as we go up the taxonomic hierarchy?

Assertion : Taxon and category are different things.
Reason : Category shows hierarchical classification.