Please choose the correct answer to the question: A condition in bees called "colony collapse disorder" occurs when worker bees leave the hive to collect nectar and never return. How would a decline in the bee population most likely affect a farm ecosystem?

Answer1: There would be a decrease in soil thickness. Answer2: There would be a decline in fruit production. Answer3: There would be an increase in plant diseases. Answer4: There would be an increase in insect pest populations.

Answer format: answer1/answer2/answer3/answer4