Which of the following are the major causes of biodiversity loss?
1. Habitat loss and fragmentation
2. Over-exploitation
3. Alien species invasions
4. Co-extinctions
Select the correct answer using the code given below:
1
1 and 2 only
2
2 and 3 only
3
1, 2 and 3 only
4
1, 2, 3 and 4