Question

if tuna belong in the same order as salmon and the same family as mackerels, which species are tuna more closely related to? not closely related to either cannot be determined salmon mackerels

Explanation:

In biological classification, the taxonomic hierarchy is Kingdom, Phylum, Class, Order, Family, Genus, Species. The family level is more specific (narrower) than the order level. Organisms in the same family are more closely related than those in the same order but different families. Since tuna is in the same family as mackerels and the same order as salmon, tuna is more closely related to mackerels.

Answer:

D. Mackerels