Which sentence uses the word uncertainty correctly?

There's a lot of uncertainty concerning the color of grass in springtime.

The delighted puppy wagged its tail and bounded toward me with uncertainty.

I was filled with uncertainty and confusion at my first swim meet.

His brash, swaggering tone made his uncertainty clear.

Your school is considering adopting a policy that requires all students to complete 100 hours of community service during there high school careers in order to graduate. the district asked for student input at the next school board meeting as to whether or not they should adopt this policy. research the topic, decide whether you are in favor of or against the new policy, and write a five-paragraph persuasive speech that you will deliver to the school board members and your principle need answer for my

Ill she not be here anon? is she not hurrying to upbraid me for my haste? have i not heard her footstep on the stair? do i not distinguish that heavy and horrible beating of her heart? what is the effect of parallelism in this excerpt? it emphasizes usher’s misunderstanding. it emphasizes usher’s love for his sister. it emphasizes usher’s psychological fixation. it emphasizes usher’s melancholy nature.

Who dies in a duel because of his pride and his anger