Which of the following is NOT a suffix related to eating or digestion?

The choice identified as not relating to eating or digestion is indeed correct because the suffix "-phobia" refers to an irrational fear or aversion to something, rather than a relationship with eating or digestion. In the context of medical terminology:

• The suffix "-phagia" pertains to eating or swallowing; for example, "dysphagia" means difficulty swallowing.

• The suffix "-pepsia" relates to digestion; for instance, "dyspepsia" refers to impaired digestion or indigestion.

• The suffix "-phage" is used to describe eating or consuming. For example, "macrophage" refers to a type of cell that engulfs and digests cellular debris and pathogens.

Thus, while the other options are all linked to processes of eating or digestion, "-phobia" diverges from that theme and therefore is the option that stands apart as unrelated.