The correct option is: to focus attention on the receiver of the action.
The correct option that describes the purpose of using active voice is "to make writing stronger." Active voice is a writing style where the subject of the sentence is performing the action, which makes the sentence more direct, concise, and engaging. In active voice sentences, the subject is the doer of the action, and the receiver of the action is the object. This helps to clearly convey the message, maintain reader interest, and create a more impactful writing style. To use active voice, simply write sentences in a way where the subject is actively performing the action.