What name is given to an irregular dark line or streak often seen in Hα photographs of the solar photosphere,often associated with sunspots?

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Quizplus · Accepted Answer

A filament is an irregular dark line often seen in Hα photographs of the solar photosphere and is associated with sunspots. Granules are small bright cellular structures seen in the photosphere, spicules are jet-like features extending from the solar surface into the corona, and plage are bright patches seen near sunspots.

What Name Is Given to an Irregular Dark Line or Streak