The amount of oxygen produced by a tree depends on

Options

A. the species of tree
B. the age of tree
C. its health
D. All the above

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the factors that influence the amount of oxygen produced by a tree.

2. **Analyzing the Options**:
- **Option 1: Species of Tree**: Different species of trees have varying capacities for photosynthesis, which affects their oxygen production. For example, some species are more efficient at converting carbon dioxide into oxygen than others.
- **Option 2: Age of Tree**: The age of the tree plays a significant role in oxygen production. Young trees often produce more oxygen as they are in a rapid growth phase, while older trees may produce less oxygen as their growth slows down.
- **Option 3: Health of Tree**: The health of the tree is crucial. A healthy tree with no diseases or pests will photosynthesize more effectively, leading to higher oxygen production.

3. **Conclusion**: Since all the factors mentioned (species, age, and health) influence the amount of oxygen produced by a tree, the correct answer is:
- **Option 4: All of the above**.

### Final Answer:
The amount of oxygen produced by a tree depends on the species of tree, the age of the tree, and its health. Therefore, the correct answer is **all of the above**.

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