Answer:
Service benefits the helpers and those helped.
Step-by-step explanation:
The main idea of a text is the main point the author is making. The main idea of the given article excerpt is that service benefits the helpers and those helped.
The passage tells about the significance of service. It doesn't simply tell about what the service is. It explains how important it is to some people and provides one example of it - planting crops for the soup kitchen, which then feeds people who can't afford food. Service isn't only food-related, though, and it isn't valuable simply because it is done for free. The fact that it is done for free enables it to be more efficient, but that isn't the main point. The main point is that it helps people, including the helpers. This is clearly stated in the last two paragraphs. The helpers become better people and learn about compassion.
This is why the second option is the correct one.