Final answer:
The correct 5-letter word for a small morsel of bread or cake is 'Crumb'. This term is specific to the small pieces that break off from larger baked items.
Step-by-step explanation:
The correct answer to the question is a) Crumb. A crumb is a small morsel or particle that breaks off from a piece of bread or cake. This term is often used to describe the tiny bits that fall off when you eat or cut into baked goods. The other options provided, such as b) Grind, c) Munch, and d) Slice, do not accurately describe a small morsel of bread or cake. "Grind" implies pulverization, "Munch" signifies eating, and "Slice" pertains to a distinct portion, none accurately portraying the specific small portion synonymous with a crumb. Thus, the term "crumb" distinctly encapsulates the minuteness and characteristic separation associated with fragments of baked delicacies.