Which situations are best suited for the passive voice? select three options. when you are talking about a general truth when the performer of the action is unknown when you want to emphasize the action directly when you want to emphasize the receiver of the action when you want to be clear about who performs the action

The passive voice formed by Subject + verb to be+Past Participle. The object in the active voice becomes the subject of the passive voice and the subject of the active voice is either the object in the passive voice or is not mentioned.  

The passive voice is used when we don't know the performer of the action. Example: “The house was built in 1884” in this case we don't know who built the house.

The passive voice is used when the focus is on the receiver of the action. Example: “Five people were killed in a car accident”, in this case the focus is on “five people”

The passive voice is used when the focus is on the action. Example: “The car was stolen”, in this case the emphasis is on the fact that the car was stolen and not on who stole it.  

So the three options that apply to the uses of the passive voice are:

when the performer of the action is unknown  

when you want to emphasize the action directly  

when you want to emphasize the receiver of the action

the reason some people sacrifice their own life for another person's life could be that they are in love with them and would do anything to keep them safe a protected even if that means risking their life in the process

you have to tell us what you're talking about or it's impossible to answer.