The topic sentence that should be added to this body paragraph is 1. Local community programs provide opportunities for volunteers to share their expertise.
It says here that they share their knowledge and learn more about the things they can do to help others.
In order to replace the infinitives with gerunds, all main verbs or actions need be have the -ing ending and eliminate the word "to". The sentence should be revised in the following way:
Hosting a party of this magnitude requires cleaning and organizing the house before getting to the part of adding decorations to the rooms.
The term is called Tone. the tone of the text indicates the author’s attitude that is expressed through words and details they decide to include in the text
