Which element is used by plants to form cytochrome?

Explanation

**Step-by-Step Solution:**

1. **Understanding Cytochrome**: Cytochrome is a type of pigment found in plants, similar to chlorophyll. It plays a crucial role in various biochemical processes, particularly in cellular respiration.

2. **Identifying the Element**: To determine which element is essential for the formation of cytochrome, we need to look at the components required for pigment synthesis in plants.

3. **Role of Micronutrients**: Micronutrients are elements that plants require in small amounts for their growth and development. Among these, certain elements are specifically known for their role in pigment formation.

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