Conflict. Every novel needs conflict, and it's also incredibly important for building suspense. ... Pacing. The pace of your novel is another important component to building suspense. ...
Red herrings. Red herrings are clues in your story that mislead readers. ...
Atmosphere. ...
High stakes

Atmosphere refers to mood or feeling whereas high stakes refers to advancement in the story.

Explanation:

Mood in literature is another word for the atmosphere. The mood is the feeling that the writer is trying to produce or creates in their readers feelings like calmness, anxiety, joy, or anger while on the other hand, high stakes allows to keep the plot moving, characters growing and changing, and keep your readers engaged in the story and creates the interest of the readers. Without high stakes, your story may feel flat.

chapter i -- paris: september, 1792

a surging, seething, murmuring crowd of beings that are human only in name, for to the eye and ear they seem naught but savage creatures, animated by vile passions and by the lust of vengeance and of hate.

during the greater part of the day the guillotine had been kept busy at its ghastly work: all that france had boasted of in the past centuries, of ancient names, and blue blood, had paid toll to her desire for liberty and for fraternity.

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