Identify the assertive sentence.

The assertive sentence is: (a) Several passengers were injured in the accident. Explanation: An assertive sentence is a type of sentence that makes a statement or provides information. Option (a) "Several passengers were injured in the accident" is an assertive sentence because it conveys information about the injuries sustained by passengers in the accident. The other options are different types of sentences: (b) "Drive carefully" is an imperative sentence, as it gives a command. (c) "Are you a student?" is an interrogative sentence, as it asks a question. (d) "Please help the poor" is an imperative sentence, as it gives a request or command.