Try D involuntary external not a 100% shure tho but it’s worth a try because sweating is involuntary u can’t control that and is external meaning out side the body.
I believe that paleomagnetism was a key to determining that the seafloors were spreading since the paleomagnetism changes at certain geological intervals so that stripes of new rock with the youngest paleomagnetism would be right at the mid-ocean trenches and successively would be older the further they are from the trench, ie on either side of it, symmetrically.
Facilitated diffusion if the particle is transported down a concentration gradient or active transport if the particle is transported against a concentration gradient. Depending on the diagram, the answer could also be uniport which refers to the transport of a particle in a single direction.
The common example of sublimation is shrinking of ice cubes that are not used in the freezer and conversion of dry ice rapidly into wispy clouds which vanish very soon
