16. Which of the following explanations accounts for the
formation of sunspots?
O A. The curvature of magnetic fields near the sun's equator creates
pockets in the photosphere that aren't warmed by convection.
B. Magnetic field reversal causes portions of the sun to die slowly
over time, leaving dark marks.
O C. The movement of plasma is much faster on the poles than on the
sun's equator, and this creates pockets of intense heat.
OD. Volcanic eruptions are sustained by the photosphere, resulting in
hardened lava on the sun's surface.

Due to the inhibition of convection by the magnetic fields, these areas (usually occur in pairs corresponding to the two poles), the hot plasma from the sun’s interior doe not reach the surface of these areas hence creating local regions that are cooler than the rest of the photosphere. This cooler regions appear darker when observed with a telescope and are called sunspots.

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trytohelp trytohelp · Answer 2 · 2019-12-07T12:29:00+01:00

so the answer is : B. Magnetic field reversal causes portions of the sun to die slowly over time, leaving dark marks.

Further explanation

Sunspots are the most prominent features of the sun; medium size spots about the size of the earth. Sunspots form and disappear for days or weeks. Sunspots are the coldest part of the sun and usually appear in pairs. Sunspots occur when a strong magnetic field appears on the sun's surface and causes the area to cool, from 6000 ° C to 4200 ° C; the area appears as a dark spot. The darkest area at the center of the spots is called the umbra; this is where the strongest magnetic field. The less dark areas around the umbra are called the penumbra. Sunspot activity is an 11-year cycle. Sunspots are an indicator of magnetic activity in the sun. Magnetic fields in spots store energy that is thrown in flares. As a result, flares usually appear in cycles that resemble 11-year cycles. Sunspots usually occur in groups (usually as simple pairs) but sometimes in complex arrangements with many complex spots and shapes. This unusual area often produces flares. Space weather forecasters use the complexity and shapes of sunspots to predict flares — the more complex the groups of spots there are, the more likely a flare will occur there.

For more than 300 years, the average number of sunspots regularly varies in an 11-year cycle. Every 11 years, the polarity of the magnetic field in the solar hemisphere changes. So, the complete solar magnetic cycle is 22 years.

Learn More :

Sunspots; https://brainly.com/question/1652375,https://brainly.com/question/3095225,https://brainly.com/question/12701363.

Details

Class: Junior high.

Subject: Biology.

Keywords: Sunspot, magnetic, earth.