What are the significance of plants?
I. Provides `CO_2` to animals which they breathe.
II. Provide all desired nutrient which are essential for growth and development.
III. Plants provide material that have medicinal value.
Select the correct answer using the codes given below.

Options

A. I and II
B. II and III
C. I and III
D. I,II and III

Explanation

To determine the significance of plants based on the given statements, we will evaluate each statement one by one.

### Step-by-Step Solution:

1. **Evaluate Statement I**: "Provides CO₂ to animals which they breathe."
- This statement is incorrect. Plants do not provide CO₂ for animals to breathe. Instead, plants take in CO₂ during photosynthesis and release oxygen (O₂), which is what animals and humans need to breathe.

2. **Evaluate Statement II**: "Provide all desired nutrients which are essential for growth and development."
- This statement is correct. Plants are a primary source of nutrients for both humans and animals. They provide essential nutrients such as carbohydrates, proteins, vitamins, and minerals that are crucial for growth and development.

3. **Evaluate Statement III**: "Plants provide materials that have medicinal value."
- This statement is also correct. Many plants have medicinal properties and are used in traditional and modern medicine. Examples include neem and tulsi, which are known for their health benefits and medicinal uses.

4. **Conclusion**:
- Based on the evaluations:
- Statement I is incorrect.
- Statement II is correct.
- Statement III is correct.
- Therefore, the correct answer includes statements II and III only.

### Final Answer:
The correct answer is: II and III are significant; therefore, the answer is **(B) II and III only**.

---