1: is the following sentence in active or passive voice?
the hamster can be kept in a cage

2 : is the following sentence written in active or passive voice?
the police didn't find the robber last week.

3 : is the following sentence written in active or passive voice?
the search will be stopped because of the storm.

4 : is the following question written in the active or passive voice?
the train is going to arrive late.

5 : is the following sentence in passive or active voice?
the friends have been looking forward to meeting her.

6 : is the following sentence written in the active or passive voice?
the report must be completed by next friday.

Explanation:

The active voice reveals the doer of the action that is mentioned in the sentence and attributes the action to a certain person or thing. The active voice is more affirmative since the perpetrator is known.

The passive voice is more discrete and tells what is being done to what without saying who or what is the doer of the action. The passive voice is used to make general statements without attributing the action to anything or anyone in particular.

given the fact that the question is about the detail that best support the idea that oppressive leaders use   propaganda to achieve thir goals,   the first option does not refer to any kind of propaganda, since it only tells about that the milk and the windfall apple should be reserved for the pigs. in the second option, that is, "snowball and napoleon sent out flights of pigeons whose instructions were to mingle with the animals on the neighbouring farms, tell them the story of the rebellion, and teach them the tune of "beasts of england". it can be identified that the oppressors make use of the propaganda, which is represented by the pigeons, and the information they have to tell other animals about what was happening in the farm in order to get their objectives. for that reason, the right answer is the second option, taking into account that the third option do not refer to propaganda since it only talks about that they did not want jones back. and, finally, the last option refers to the result of the given news, but it does not mean about the propaganda they used to achieve their goals.