To accurately determine the author's purpose for writing Passage 2, it would be helpful to have context or specific details from that passage. However, based on the options provided, if Passage 2 focuses on initiatives like share tables in schools that aim to reduce food waste and promote sharing surplus food, then B. to encourage the use of share tables in schools could be the most fitting choice.
If you can provide more information or details from Passage 2, I could give a more precise answer!