Fill in the following blanks with suitable words :
Metamorphosis in amphibians is brought about by ………………….. hormone.

Explanation

**Step-by-Step Solution:**

1. **Understanding Metamorphosis**: First, we need to understand what metamorphosis is. It is a biological process where an organism undergoes significant changes in its structure and form during its life cycle. In amphibians, this process is particularly notable.

2. **Identifying the Organism**: The question specifically mentions amphibians. A common example of an amphibian is the frog, which undergoes metamorphosis from a larval stage (tadpole) to an adult form.

3. **Recognizing the Role of Hormones**: Metamorphosis in amphibians is regulated by hormones. Hormones are chemical messengers that control various physiological processes in organisms.

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