Final answer:
Suspense is the term used to describe the reader's feeling of uncertainty regarding the acting or outcome of a story. It creates tension and keeps the reader's interest by building anticipation.
Step-by-step explanation:
The term used to describe the reader's feeling of uncertainty regarding the acting or outcome of a story is suspense. This element keeps the reader's interest by creating tension and anticipation as they continue to read. Suspense is often built through various literary devices such as foreshadowing, cliffhangers, and unexpected plot twists.