The salt in ocean water comes from all of the following EXCEPT A
eroding land.
В.
melting glacial ice.
C
volcanic emissions.
D
reactions on the sea floor.

I know that it is reaction on the sea floor so it is D

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.