Answer:
Service improves society, impacting the helpers as well as those needing assistance.
Step-by-step explanation:
The first sentence in this paragraph restates the thesis of the artice. The thesis of a text is the main claim that the text puts forward. This text is intended to show that service is an important part of society and that it brings a lot of benefits both for the helpers as for the receivers. This main claim is restated in this sentence in order to leave a lasting impression in the mind of the reader.