What are fiddleheads in ferns?

Explanation

**Step-by-Step Solution:**

1. **Definition of Fiddleheads**: Fiddleheads are the young, coiled fronds of ferns. They are typically found in the early stages of fern growth before they unfurl.

2. **Appearance**: Fiddleheads are characterized by their curled shape, resembling the scroll of a violin, which is how they got their name. This coiling protects the delicate fronds as they develop.

3. **Growth Process**: As the fiddleheads mature, they gradually unroll and expand into full fronds, which are the leafy parts of the fern.

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