Q: 21 (IAS/2017)

Due to some reasons, if there is a huge fall in the population of species of butterflies, what could be its likely consequence/consequences?
1. Pollination of some plants could be adversely affected.
2. There could be a drastic increase in the fungal infections of some cultivated plants.
3. It could lead to a fall in the population of some species of wasps, spiders and birds.
Select the correct answer using the code given below:
question_subject: 
Science
question_year: 
2017
question_exam: 
IAS
stats: 
0,688,536,112,8,688,416