In the levels-of-processing model of memory, information that gets processed at a level (such as accessing the meaning of a word of phrase) is more likely to be retained longer and form a stronger memory than information that is processed at a level (such as the visual characteristics of a word).

deeper; shallower

Explanation:

As it relates to levels of processing models of memory, when an information is processed at a deeper level, such information tend to last longer and also be more elaborate. Deep processing for example semantic processing (based on phrases and words) leads to the formation of a stronger memory.

When an information is processed at a shallower level, usually based on orthographic features and phonemic, the information tend not to last longer and hence making such information prone to rapid decay. In the case of shallow processing the memory is usually fragile, meaning information can easily be lost.

because he had a big bear belly