Answer:
Step-by-step explanation:
Sinclair's purpose was to describe the harsh working conditions that immigrants were subjected to in the US meat industries.
Although you didn't show the novel this question refers to, we can say from the context of the question that it refers to the novel "The Jungle" written by Upton Sinclair.
When reading this novel, we can see that:
The author had a strong social bias and wanted to influence beneficial social reforms.
He knew how immigrants were subjected to inappropriate working conditions, where they were exploited and put at risk.
He also knew that the meat industry in the US was an oppressive industry, with low standards of hygiene and poor working conditions.
He believed that exposing these problems could solve them and that is why he did extensive research before writing the nova.
With this, we can see that the main objective of the author when writing this book, was to provoke a social reform, which would create a fairer and more beneficial meat industry, as well as a better treatment for immigrants.