The original Darwin's Finches on Galapagos islands was :

Options

A. Seed eater
B. Fruit eater
C. Cactus eater
D. Insect eater

Answer

To solve the question regarding the original Darwin's Finches on the Galapagos Islands, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Subject**: The question pertains to Darwin's Finches, which are a group of bird species that Charles Darwin studied during his visit to the Galapagos Islands.

**Hint**: Think about the significance of Darwin's observations regarding species variation.

2. **Understand the Context**: During his journey, Darwin observed various species of finches that had adapted to different ecological niches on the islands. He noted that these birds had different beak shapes and sizes, which were adaptations to their feeding habits.

**Hint**: Consider how environmental factors can lead to adaptations in species.

3. **Determine the Original Finch**: The original finch that Darwin observed is believed to have been a seed-eating bird. This bird served as the ancestor from which various finch species evolved.

**Hint**: Reflect on the concept of a common ancestor in evolutionary biology.

4. **Recognize the Evolutionary Process**: Through the process of natural selection, the original seed-eating finch adapted to various food sources available on the islands, leading to the evolution of different beak shapes suited for eating fruits, insects, and even cactus.

**Hint**: Think about how changes in diet can influence physical traits in animals.

5. **Conclude the Answer**: Based on the information gathered, the original Darwin's Finch on the Galapagos Islands was a seed-eating bird.

**Hint**: Summarize the key points to reinforce your understanding of the topic.

### Final Answer:
The original Darwin's Finches on the Galapagos Islands were seed-eating birds.