The answer is (c) note the main ideas. If you already note the main idea it will help you better.
Love
Abstract language involves concepts such as faith, hope, etc.
Answer:
<u><em>To give </em></u>is one of the best things people can do. <em><u>Volunteering</u></em> their time showed what caring people they are.
Explanation:
Gerunds are the words that are in the "-ing" form of the verb but acts as a noun. On the other hand, infinitives are the verbs that are preceded by "to" but do not act as a verb in the sentence.
In the given sentence, the word "giving" is a gerund while "to volunteer" is an infinitive. Changing these two into an infinitive and a gerund will make the sentence as
<u><em>To give </em></u>is one of the best things people can do. <em><u>Volunteering</u></em> their time showed what caring people they are.