"some people buy organic food because they believe organically grown crops are more nutritious and safer for consumption than (the people who purchase) their conventionally grown counterparts.

the underlined portion would be most improved by being replaced with:

no change

the purchase of

purchasing

delete the underlined portion.

  plan: i will begin with a quotation about the importance of unity in a community. then, i will state my claim that an activity will unite our school by creating a shared vision, purpose, and direction. in the body, i will use three main points that describe the different avenues the students can take: through a variety of clubs, through a special event, or through an awareness week. i will provide evidence about other towns that have unity activities and the kinds of events that they include. pictures will illustrate my three main points in action. for the ending, i will restate the main idea in a new way and pose a question to keep the audience thinking.