Final answer:
The cycle of doing the cognitive function of encoding and retrieval is cyclical. Encoding involves inputting information into the memory system, while retrieval is the act of getting information out of memory and back into awareness.
Step-by-step explanation:
The cycle of doing the cognitive function of encoding and retrieval is D) Cyclical. Encoding involves inputting information into the memory system, while retrieval is the act of getting information out of memory and back into awareness. These two processes are interconnected and form a cycle in the functioning of memory.