Several people were injured that night.

Explanation:
Several is the correct answer because it means "more than a few but not many." In this context, it implies that there were a significant number of people injured, but not a large or overwhelming number.

- Several: The word "several" is an adjective that means "more than a few but not many." It indicates an amount or number that is significant but not excessively large. In the context of the sentence, it suggests that there were a notable number of people injured that night.

- Injured: The word "injured" is the past participle form of the verb "injure." It refers to individuals who have sustained physical harm or injury. In this case, it indicates that a number of people experienced some form of physical harm on that particular night.

- That night: The phrase "that night" specifies the specific time period when the injuries occurred. It narrows down the context and implies that the injuries took place during a specific evening or nighttime.

- People: The word "people" refers to individuals, human beings, or persons in general. In this context, it specifies that individuals were affected by the incident and suffered injuries.

- Were: The word "were" is the past tense form of the verb "to be." In this case, it indicates that the injuries occurred in the past.

In conclusion, the correct answer is "Several" because it accurately describes the number of people injured, suggesting a significant but not overwhelming amount.