Identify the possible link ''A'' in the following food chain
Plant `rarr` insect frog `rarr` ''A'' `rarr` Eagle

Options

A. Wolf
B. Cobra
C. Parrot
D. Rabbit

Answer

To identify the possible link "A" in the food chain:

1. **Understanding the Food Chain**: The food chain provided is as follows: Plant → Insect → Frog → "A" → Eagle. In this chain, we need to find an organism that can be eaten by the eagle and that also preys on the frog.

2. **Identifying the Role of "A"**: The organism "A" must be a carnivore that feeds on frogs. This means we need to look for a predator that can consume frogs and is also a potential prey for the eagle.

3. **Evaluating Possible Organisms**: We will consider various organisms to see if they fit the criteria:
- **Wolf**: Wolves are top carnivores and do not eat frogs; they typically hunt larger animals.
- **Parrot**: Parrots primarily feed on fruits and insects; they do not eat frogs.
- **Rabbit**: Rabbits are herbivores that feed on grasses and do not eat frogs.
- **Cobra**: Cobras are snakes that are known to eat frogs. They fit the criteria of being a predator of frogs.

4. **Conclusion**: Since the cobra is a predator of frogs and can be preyed upon by the eagle, the possible link "A" in the food chain is the **Cobra**.