The sodium-potassium pump is an example of passive transport. active transport. isotonic transport. endocytosis transport.

The sodium-potassium is an example of  Active transport. 
Cells often need to create concentration gradients across membranes. The concentration of a molecule is much higher on one side of the membrane than the other when a concentration gradient exists. Sodium potassium pump is vital to numerous bodily processes, such as nerve cell signalling, heart contractions, and kidney functions. Active transport involves movement of substances against a concentration gradient.

Honestly "global warming" may be a slight possiblity, however they called it "climate change" because its not real, in fact we had one of our coldest days here not too long ago, and the "issues" with this subject is a blindfold for actual problems.

Phagocytes contain digestive enzymes to facilitate the process of phagocytosis