In the diagram, the arrow is pointing to a small digestive organelle filled with enzymes called a a) golgile. b) lysosome. c) ribosome. d) vacuole.

I believe the answer is Lysosome. Lysosome contain proteases, that are destructive to proteins. They are generally used to break down foreing proteins. They also contain hydrolytic enzymes necessary for intracellular digestion. They are common in animal cells, but are rare in plant cells. Hydrolytic enzymes of plant cells are more often found in the vacuole. 

The answer is option a