Question

What refers to the initial perception and registration of information?
•encoding
•retrieval
•storing
•processing

Answer 1

That sounds to me like "encoding."

The whole process of memory happens in this order:

1. Encoding
2. Storage
3. Retrieval

ENCODING is where we take something that we experience,
and we shape it into a way that we can understand,
so that we can remember it, for later.