Give appropriate names of the respective phyla and one example for each of the following:
Animals with a two-layered body wall and a mouth surrounded by tentacles.________.

Explanation

To solve the question, we need to identify the appropriate phylum for animals that have a two-layered body wall and a mouth surrounded by tentacles.

### Step-by-Step Solution:

1. **Understanding the Characteristics**:
- The animals described have a two-layered body wall, which indicates they are **diploblastic**. This means they have two primary germ layers: the ectoderm and the endoderm.
- They also have a mouth surrounded by tentacles, which is a common feature in certain groups of animals.

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