The birds of Galapagos islands are

Options

A. Seed eating finches
B. insect eating finches
C. Cactus eating finches
D. all of the above

Answer

### Step-by-Step Solution:

1. **Identify the Birds of Galapagos Islands**: The birds found on the Galapagos Islands are commonly known as Darwin's finches. They are a group of about 15 species that exhibit a variety of feeding habits.

2. **Understand the Feeding Habits**: The finches on the Galapagos Islands have adapted to different food sources, which has led to variations in their beak size and shape. The primary feeding habits include:
- **Seed Eating**: Some finches primarily eat seeds, which requires strong, thick beaks to crack open the seeds.
- **Insect Eating**: Other finches feed on insects, necessitating a different beak shape suited for catching and consuming insects.
- **Cactus Eating**: Certain finches have adapted to eat cactus parts, including the fruit and flowers, which requires specialized beaks for accessing this food source.

3. **Analyze the Options**: The question provides four options:
- Seed eating finches
- Insect eating finches
- Cactus eating finches
- All of the above

4. **Determine the Correct Answer**: Since all three types of feeding habits are represented among the Darwin's finches, the correct answer is "all of the above."

### Final Answer:
The birds of Galapagos Islands are **all of the above** (seed eating finches, insect eating finches, cactus eating finches).

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