Select the option that expresses the given sentence in active voice.

Let the farewell be hidden to our seniors.

Let us bid farewell to our seniors.

The correct active voice form of the given sentence "Let the farewell be hidden to our seniors" is Let us bid farewell to our seniors.

The passive voice of the sentence is "Let the farewell be hidden to our seniors." This sentence is in the imperative mood, which is used to give a command or make a request. The passive voice is used in this sentence to make the request more polite. The active voice of the sentence is formed by putting the subject of the passive sentence before the verb and removing the word "to." In this case, the subject of the passive sentence is "us," and the verb is "bid." So, the active form of the sentence is "Let us bid farewell to our seniors."

The other options are incorrect because:

• We should be hidden farewell by our seniors." This sentence is in the passive voice, but the subject of the sentence is incorrect. The subject of the sentence should be "us," not "we."
• Our seniors should bid farewell to us." This sentence is in the active voice, but it is not polite. The word "bid" is used to make a request, but the sentence is not asking for a favor.
• Our seniors should be bidden farewell." This sentence is in the passive voice, but it is not idiomatic. The phrase "bidden farewell" is not commonly used.