Final answer:
Encopresis is a disorder characterized by involuntary fecal soiling. Increased appetite, consistent use of the toilet, and frequent episodes of diarrhea are not signs of encopresis.
Step-by-step explanation:
Encopresis is a disorder characterized by involuntary fecal soiling, which means the child is unable to control their bowel movements and has episodes of fecal soiling. This is the correct answer in this case. Increased appetite (option A) and frequent episodes of diarrhea (option D) are not specific signs of encopresis. Consistent use of the toilet (option B) is also not expected in a child with encopresis.