List the protoplasmic elements .

Explanation

### Step-by-Step Solution:

1. **Understanding Protoplasm**: Protoplasm refers to the living content of a cell, which includes the cytoplasm and the nucleus. It is the substance in which all cellular processes occur.

2. **Identifying Protoplasmic Elements**: Protoplasm is composed of various chemical elements. To identify these elements, we analyze the composition of different types of organisms, including plants, animals, and microorganisms.

3. **Common Elements Found in Protoplasm**: Through analysis, we can determine that certain elements are consistently found in the protoplasm of these organisms. The primary protoplasmic elements include:
- **Carbon (C)**
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