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Biodiversity forms the basis for human existence in the following ways:
1. Soil formation
2. Prevention of soil erosion
3. Recycling of waste
4. Pollination of crops
Select the correct answer using the codes given below:


1, 2 and 3 only


2, 3 and 4 only


1 and 4 only


1, 2, 3 and 4


Biological diversity helps in the formation and maintenance of soil structure and the retention of moisture and nutrient levels. Trees on the other hand, lower the water table and remove deposited salt from the upper soil horizons.

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