The sentences below have words that are missing. Choose the best option from those given below to complete the sentence.
In an anthropocentric ________, animals are no more than property to human beings. Therefore, the concepts of ‘humane' treatment and ‘necessary‘________ are economic in nature. The idea that killing animals is not a serious issue as long as animals are not made to suffer rests __________ on the widely accepted idea that animals do not have a right to life.