Answer:
C
Step-by-step explanation:
This is the best conclusion for Jamal's explanation because it is not repetitive and adds additional information to the end of the passage. It would not be appropriate to end the paragraph with information about having to pick bugs off of the plants, nor would it be ideal to explain the importance of dedication a second time without saying anything else. Finally, talking about the seeds should have been done in the first part of the explanation.