47. Which of the following can be threats to the biodiversity of a geographical area?
1. Global warming
2. Fragmentation of habitat
3. Invasion of alien species
4. Promotion of vegetarianism
 

Select the correct answer using the codes given below :

1. 1, 2 and 3 only

2. 2 and 3 only

3. 1 and 4 only

4. 1, 2, 3 and 4

Correct Answer :

1, 2 and 3 only