Read the passage from an argumentative essay. "The Columbian Exchange was bad. It had many effects on native peoples. One of these effects was disease. Disease harmed people. It led to death. Some say up to 90 percent of native peoples died.”

How should the passage be revised to create a more formal tone? brailn pls i need hepl

Slang terms should be removed.
First-person pronouns should be added.
Simple sentences should be balanced with more complex ones.
Long and complex sentences should be split apart and made shorter.

How to combine the two sentences in bold.

Time is not always change. time can also mean continuity, and it can mean keeping acknowledged truths in mind despite differences in circumstances.there is no better example of this in things fall apart than the retellings of the proverb about the bird named eneke, the language in both retellings is almost identical despite the length of time that has passed between their repetitions. in comparing the usages of the same proverb, achebe allows his readers to note the similarities and differences between the situations, and he them understand how this story can be applied to their own lives.

Whiat is the best example of a story's historical content?