Which endocrine gland is located inside the brain in frogs?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the specific endocrine gland located inside the brain of frogs.

2. **Identifying the Type of Animal**: Frogs are amphibians, which means they can live both on land and in water. They are also vertebrates, indicating they have a backbone.

3. **Recognizing the Systems in Frogs**: Frogs possess two major systems for control and coordination: the nervous system and the endocrine system. The endocrine system consists of glands that release hormones.

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