In mineral cycle reservoir is

Options

A. Atmosphere
B. Hydrosphere
C. Lithosphere
D. Bottom of the sea

Answer

To answer the question "In mineral cycle reservoir is," we need to identify what the term "reservoir" refers to in the context of the mineral cycle and which option among atmosphere, hydrosphere, lithosphere, and bottom of the sea is the correct answer.

### Step-by-Step Solution:

1. **Understand the Mineral Cycle**: The mineral cycle refers to the movement and transformation of minerals through different components of the ecosystem. It includes cycles such as the carbon cycle, nitrogen cycle, sulfur cycle, and water cycle.

2. **Identify the Role of Reservoirs**: In ecological terms, a reservoir is a source or storage area for a particular substance. In the context of the mineral cycle, we are looking for where minerals are stored or sourced.

3. **Analyze the Options**:
- **Atmosphere**: This primarily contains gases and is not a significant reservoir for minerals.
- **Hydrosphere**: This includes all water bodies and can contain dissolved minerals, but it is not the main reservoir for solid mineral forms.
- **Lithosphere**: This is the outer layer of the Earth, which consists of soil and rocks. It is rich in minerals and serves as a major reservoir for various minerals.
- **Bottom of the Sea**: This can contain sediments and minerals but is not specifically recognized as a primary reservoir in the mineral cycle.

4. **Choose the Correct Answer**: Based on the analysis, the lithosphere is the primary reservoir for minerals in the mineral cycle, as it contains a vast array of minerals necessary for various biological processes.

5. **Final Statement**: Therefore, the answer to the question "In mineral cycle reservoir is" is **lithosphere**.