is this sentence in active voice or passive voice? the farmer was alone in the undulating field of wheat…

is this sentence in active voice or passive voice? the farmer was alone in the undulating field of wheat. active voice passive voice
Answer
Brief Explanations:
In the sentence "The farmer was alone in the undulating field of wheat", the subject 'the farmer' is simply performing no action on an object. There is no form of 'be + past - participle' structure which is characteristic of passive - voice. So it is in the active voice.
Answer:
active voice