When do you use the past participle?

Read the passage from sugar changed the world. but there is another story as well. information about sugar spread as human knowledge expanded, as great civilizations and cultures exchanged ideas. in fact, while sugar was the direct cause of the expansion of slavery, the global connections that sugar brought about also fostered the most powerful ideas of human freedom. how do the details in this passage support the authors’ purpose? the details about the expansion of sugar inform readers about how widespread the use of sugar was. the details about human knowledge inform readers about how humans learned about sugar. the details about ideas and global connections persuade readers that sugar’s story has multiple consequences. the details about the spread of information about sugar entertain readers with stories of travel.

"in what ways does the struggle for freedom change with history? " provide one specific change that malala struggled for(only if you've read the book). think of how malala describes change and what motivated her to struggle for change. write at one complete paragraph with a minimum of 5 sentences.

If you wanted to figure out a topic and some details about that topic you would want to use a ?