What do the different categories of taxonomy represent?

Which option provides the correct answers to the following questions regarding a species?
$(i)$ What kind of offspring is a species capable of producing?
$(ii)$ What kind of individuals are included in a species?
$(iii)$ In some cases,what name is written after the species name?
$(iv)$ What is the species name of sunflower?

The correct sequence of taxonomic hierarchy is

Which taxonomic category is formed by a group of closely related species?

Describe the hierarchical arrangement of taxonomic categories with a flow chart.

Which of the following is considered a unit of classification?