Which is correct sequence in the food chain?

Options

A. Grass `rarr` Wolf `rarr` Deer `rarr` Buffalo
B. Bacteria `rarr` Grass `rarr` Rabbit `rarr` Wolf
C. Grass `rarr` Insect `rarr` Bird `rarr` Snake
D. Grass `rarr` Snake `rarr` Insect `rarr` Deer.

Answer

To determine the correct sequence in a food chain, we need to understand the roles of different organisms within it. A food chain typically consists of producers, primary consumers, secondary consumers, and tertiary consumers. Here’s a step-by-step breakdown of how to identify the correct sequence:

### Step-by-Step Solution:

1. **Identify Producers**: The first step in any food chain is to identify the producers. These are typically plants or photosynthetic organisms that create energy through photosynthesis. In the example given, grass is identified as the producer.

2. **Identify Primary Consumers**: The next step is to identify the primary consumers, which are herbivores that feed on the producers. In the example, both the deer and the buffalo are primary consumers as they consume grass.

3. **Identify Secondary Consumers**: After the primary consumers, we look for secondary consumers, which are organisms that eat primary consumers. In this case, the birds that eat insects (which in turn eat grass) are considered secondary consumers.

4. **Identify Tertiary Consumers**: Finally, we identify the tertiary consumers, which are organisms that eat secondary consumers. In the example, the snake that eats the bird is classified as a tertiary consumer.

5. **Construct the Food Chain**: Based on the identified roles, we can construct the food chain:
- **Grass (Producer) → Deer/Buffalo (Primary Consumers) → Birds (Secondary Consumers) → Snake (Tertiary Consumer)**

6. **Evaluate Other Options**: It’s important to evaluate other options presented in the question to ensure that the identified sequence is indeed the correct one. The sequence must follow the order of producers to primary consumers to secondary consumers to tertiary consumers without any deviations.

### Conclusion:
The correct sequence in the food chain based on the provided information is:
**Grass → Deer/Buffalo → Birds → Snake.**