Which of the following is NOT a benefit that humans receive from a biologically diverse world?

Options

A. source of medicine
B. source of water
C. source of economic gains
D. source of food

Answer

To determine which option is NOT a benefit that humans receive from a biologically diverse world, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand Biological Diversity**: Biological diversity refers to the variety of life forms on Earth, including plants, animals, and microorganisms. It provides numerous benefits to humans, including resources for medicine, food, and economic activities.

2. **Evaluate the Options**:
- **Option 1: Source of Medicine**: Many medicines are derived from plants and animals. This is a clear benefit of biological diversity.
- **Option 2: Source of Water**: Water is a vital resource for life, but it is primarily an abiotic factor and not directly derived from biological diversity. This suggests that it may not be a benefit from a biologically diverse world.
- **Option 3: Sources of Economic Grains**: Economic grains, such as wheat and rice, are cultivated from plants, which are part of biological diversity. This is a benefit.
- **Option 4: Food Sources**: Food comes from a variety of plants and animals, which are part of biological diversity. This is also a benefit.

3. **Identify the Odd One Out**: After evaluating all options, it is evident that while medicine, economic grains, and food sources are all benefits derived from biological diversity, water is not derived from biological diversity but rather is an abiotic resource.

4. **Conclusion**: The option that is NOT a benefit that humans receive from a biologically diverse world is **Source of Water**.

### Final Answer:
**Source of Water** is NOT a benefit that humans receive from a biologically diverse world.

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