When considering which animals have segmented bodies, it's essential to understand the anatomical structure of each group listed. Let's break down the options:

1. **Earthworms**: Earthworms are classic examples of segmented animals. They exhibit metamerism, where their bodies are divided into segments, primarily visible in their cylindrical shape.

2. **Nematodes**: Nematodes, or roundworms, do not have segmented bodies. Instead, they have a smooth, elongated form and are categorized as unsegmented.

3. **Insects**: Insects have a segmented body plan as well, consisting of a head, thorax, and abdomen, each of which is made up of multiple segments.

4. **Vertebrates**: Vertebrates do not have a segmented body structure in the same way as worms or insects. They have a backbone but their body is not segmented along its length in a way that is comparable to segmented worms or arthropods.

5. **Jellyfish**: Jellyfish do not possess a segmented body either. They have a simple body structure that is largely gelatinous and lacks true segmentation.

### Selected Animals with Segmented Bodies
- Earthworms
- Insects

### Summary
The animals that exhibit segmented body structures from the provided options are **earthworms** and **insects**. Nematodes, vertebrates, and jellyfish do not have segmented bodies.

Question

When considering which animals have segmented bodies, it's essential to understand the anatomical structure of each group listed. Let's break down the options:

1. **Earthworms**: Earthworms are classic examples of segmented animals. They exhibit metamerism, where their bodies are divided into segments, primarily visible in their cylindrical shape.

2. **Nematodes**: Nematodes, or roundworms, do not have segmented bodies. Instead, they have a smooth, elongated form and are categorized as unsegmented.

3. **Insects**: Insects have a segmented body plan as well, consisting of a head, thorax, and abdomen, each of which is made up of multiple segments.

4. **Vertebrates**: Vertebrates do not have a segmented body structure in the same way as worms or insects. They have a backbone but their body is not segmented along its length in a way that is comparable to segmented worms or arthropods.

5. **Jellyfish**: Jellyfish do not possess a segmented body either. They have a simple body structure that is largely gelatinous and lacks true segmentation.

### Selected Animals with Segmented Bodies
- Earthworms
- Insects

### Summary
The animals that exhibit segmented body structures from the provided options are **earthworms** and **insects**. Nematodes, vertebrates, and jellyfish do not have segmented bodies.

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