Why are nutrient cycles in nature called biogeochemical cycles? 

Explanation

### Step-by-Step Solution:

1. **Definition of Nutrient Cycles**: Nutrient cycles refer to the natural processes through which essential nutrients are recycled in the ecosystem. These nutrients include carbon, nitrogen, phosphorus, and others that are vital for the survival of living organisms.

2. **Introduction to Biogeochemical Cycles**: The term "biogeochemical" combines three components: "bio" refers to living organisms, "geo" refers to the earth (rocks, soil), and "chemical" refers to the chemical elements and compounds involved in the cycles.

3. **Transfer of Nutrients**: Nutrients (in the form of ions or molecules) are transferred from the environment (which includes rocks, air, and water) to living organisms (the biotic components of the ecosystem). This transfer is crucial for the growth and development of organisms.

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