Give an example for each of the following
A viviparous animal
(b) A fish possessing a poison sting
(c ) A fish possessing an electric organ
(d) An organ, which regulates buoyancy
(e) Animal, which exhibits alternation of generation
(f) Oviparous animal with mammary of gland

Explanation

To answer the question, we will provide examples for each of the specified categories in the animal kingdom:

### Step-by-Step Solution:

1. **A viviparous animal**:
- Example: **Human (Homo sapiens)**. Viviparous animals are those that give birth to live young instead of laying eggs.

2. **A fish possessing a poison sting**:
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