The two correct matches between cause and effect in the provided terms and phrases about solar activity are:
-
solar activity -- sudden eruptions of large bubbles of plasma and magnetic energy
- This phrase correctly describes solar activity as it encompasses various phenomena including coronal mass ejections and solar flares.
-
solar flare -- sudden release of magnetic energy
- This accurately reflects the nature of solar flares, which are bursts of energy due to the sudden release of magnetic energy stored in the sun's atmosphere.
The other phrases either mismatch the terms or provide incorrect descriptions.