Answer:
The next time you're buying produce, think about the fruits and vegetables you're putting in your cart.
Step-by-step explanation:
This is the sentence that best creates an effective conclusion. For a conclusion to be considered effective, this has to create a feeling of closure in the mind of the reader. Moreover, an effective conclusion usually encourages a reader to take action in a particular way. In this example, the phrase urges the reader to think about what he recently learn and chose organic produce when shopping.