Analyze the following terms and phrases about solar activity. select the two that represent correct matches between cause and effect.(1 point)

a) solar activity -- sudden eruptions of large bubbles of plasma and magnetic energy

b) coronal mass ejection -- relatively cool spot on surface of the sun

c) sun's magnetic field -- uneven churning of the sun's gravitational field

d) solar flare -- sudden release of magnetic energy

e) sunspot -- magnetic field of the sun emerges as a loop

a) solar activity -- sudden eruptions of large bubbles of plasma and magnetic energy

and

d) solar flare -- sudden release of magnetic energy

Explanation:

We can start by eliminating the options that are definitely wrong.

A coronal mass ejection is not a relatively cool spot on surface of the sun, in fact such a spot is a sunspot, while a coronal mass ejection occurs when the  magnetic field of the sun emerges as a loop. Thus, both options B and E are incorrect, leaving only A,  C, and D. Option C makes no sense, as the sun's gravitational field does not 'churn'. Thus, only options A and D are left. A closer look at A and D reveals they are correct; solar flares are in fact sudden releases of magnetic energy, as seen in this quote from UC Berkeley's website; "Solar flares are caused by sudden changes of strong magnetic fields in the Sun's corona.". And solar activity is a blanket term for the effects of eruptions of plasma and magnetic energy from the sun.

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.