What are deuterostomous animals? Give one example.

Explanation

### Step-by-Step Solution:

1. **Definition of Deuterostomous Animals**:
- Deuterostomous animals are a group of animals characterized by the development of the anus from the blastopore during embryonic development. This means that during the early stages of development, the first opening that forms (the blastopore) becomes the anus, while the mouth develops later.

2. **Understanding Blastopore**:
- The blastopore is an opening that forms during the gastrulation stage of embryonic development. In the case of deuterostomes, this opening will eventually develop into the anus.

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