Run the experiment again adding a third jar with a fine mesh cover. Flies and maggots are only found in the open jar. What is the purpose of adding a third jar with a fine mesh cover?
1) To observe the behavior of flies and maggots in a controlled environment
2) To prevent flies and maggots from entering the jar
3) To compare the number of flies and maggots in the open jar with the covered jar
4) To test the effectiveness of the fine mesh cover in preventing flies and maggots from entering the jar