Which of the following help in maintaining the supply of nutrients to the growing plants and trees in a forest?

Options

A. saprotrophs
B. autotroph
C. carnivores
D. heterotrophs

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks which organisms help maintain the supply of nutrients to growing plants and trees in a forest.

2. **Analyzing the Options:**
We have four options to consider:
- Saprotrophs
- Autotrophs
- Carnivores
- Heterotrophs

3. **Evaluating Each Option:**
- **Option 1: Saprotrophs**
- Saprotrophs are organisms like fungi that feed on non-living organic matter (detritus).
- When they decompose this matter, they release nutrients, carbon dioxide, and water back into the soil.
- These nutrients are essential for the growth of plants and trees.
- **Conclusion:** This option is correct.

- **Option 2: Autotrophs**
- Autotrophs are organisms that produce their own food using sunlight and water (like plants).
- They do not directly contribute to the supply of nutrients from decomposed matter.
- **Conclusion:** This option is incorrect.

- **Option 3: Carnivores**
- Carnivores are animals that eat other animals.
- They do not play a role in nutrient supply for plants and trees.
- **Conclusion:** This option is incorrect.

- **Option 4: Heterotrophs**
- Heterotrophs are organisms that consume other organisms (including plants) for energy.
- While they are part of the food chain, they do not contribute to nutrient supply in the same way saprotrophs do.
- **Conclusion:** This option is incorrect.

4. **Final Conclusion:**
The only option that helps in maintaining the supply of nutrients to the growing plants and trees in a forest is **Saprotrophs**.

**Final Answer:** Saprotrophs

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