You Are Lying on a Sand Dune Looking Over the Water

You are lying on a sand dune looking over the water, listening to the waves, and enjoying the feel of the sun and wind on your skin. You also smell the salty ocean air and seaweed that has washed ashore.
-When you smell the salty air and seaweed,what is being activated?

A) mechanoreceptor
B) thermoreceptor
C) photoreceptor
D) chemoreceptor
E) pain receptor