Answer:
nonviolent resistance is an important tool in the fight for positive change.
Step-by-step explanation:
DDT, Aldrin and Dieldrin are pesticides used in agriculture that cause many health problems for the applicators and consumers of these agricultural producers.
In the text shown in the question above, we realize that the narrator wishes that these pesticides are no longer used among grape growers, that is, the narrator wants to cause a positive change in the production of grapes and for this reason, he is calling on the population to establish non-violent resistance. To show the effectiveness of nonviolent resistance he uses as an example, boycotts established in the past that have managed to trigger positive change in society.