Consider the following statements and give appropriate names of the phyla and one example for each of the following:
Marine unsegmented an exoskeleton and animals a spiny with skin_______________.

Explanation

To solve the question, we need to identify the phylum that corresponds to the description provided: "Marine unsegmented, an exoskeleton, and animals spiny with skin."

### Step-by-Step Solution:

1. **Identify Key Features**:
- The animals are marine (live in the ocean).
- They are unsegmented (not divided into segments).
- They have an exoskeleton (a hard outer structure).
...