What animal has the strongest sense smell​

Which animal has the strongest sense of smell?

the index of refraction of the second medium is higher. i just took the test trust me !

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.