The na/k atpase is an example of an atp dependent ligand-gated channel that allows for the movement of sodium against its concentration gradient. when this transporter is active

The answer is active transport. Active transport is the development of atoms over a cell film from a locale of their lower focus to an area of their higher fixation—toward some slope or another hindering element. 
Essential active transport, additionally called coordinate dynamic transport, specifically utilizes metabolic vitality to transport atoms over a layer

On edgenuity it is d: watermelons 

Carbon dioxide is the correct answer