Which of the following reasons can be attributed to the richness of natural vegetation in tropical rainforests?
1. Fertile soil
2. Intense sunlight for photosynthesis
3. Wet climate
4. Seasonal changes to facilitate nutrient absorption
Select the correct answer using the codes given below:
1 and 4 only
1, 2, and 3 only
All of the above
2 and 3 only
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