Which scientific term is used for a convenient category for the study of organisms?

Select the correct match for Column $X$ and Column $Y$:

Column $X$ (Organism)	Column $Y$ (Family)	Column $Z$ (Order)
$(1)$ Sunflower	$(A)$ Blattidae	$(P)$ Opisthopora
$(2)$ Earthworm	$(B)$ Asteraceae	$(Q)$ Glumiflorae
	$(C)$ Megascolecidae	$(R)$ Anura
		$(S)$ Asterales

Which of the following taxonomic categories has more common characteristics than the $Genus$ level, but fewer than the $Species$ level?

Which of the following taxonomic categories contains organisms least similar to one another?

Musca domestica is the scientific name of

Refer to the botanical name of wheat $Triticum\ aestivum$ and identify the statement which correctly describes it.