The bacteria which attack dead animals are

Options

A. first link of the food chain and are known as primary producers
B. third link of the food chain and are tertiary consumers
C. the end of food chain and are decomposers
D. the end of food chain and are decomposers.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Role of Bacteria in the Ecosystem:**
- Bacteria play a crucial role in the decomposition of organic matter. They break down dead plants and animals, recycling nutrients back into the ecosystem.

2. **Identifying the Type of Bacteria:**
- The bacteria that specifically attack dead animals are known as decomposers. They help in the decay process by breaking down complex organic materials into simpler substances.

3. **Recognizing the Importance of Decomposers:**
- Decomposers, including bacteria and fungi, are essential for nutrient cycling. They convert dead organic matter into nutrients that can be reused by plants, ensuring the continuity of the food chain.

4. **Evaluating the Options Given:**
- The options provided in the question are:
- First link of the food chain and are known as primary producers.
- Third link of the food chain and are tertiary consumers.
- End of food chain and are decomposers.
- The first option is incorrect because primary producers are plants, not bacteria. The second option is also incorrect as tertiary consumers are typically carnivores that eat herbivores.

5. **Selecting the Correct Answer:**
- The correct answer is "end of food chain and are decomposers," as bacteria are indeed at the end of the food chain and play the role of decomposers.

**Final Answer:**
The bacteria which attack dead animals are at the end of the food chain and are known as decomposers.

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