Please help.

210 degrees

Step-by-step explanation:

This question involves the unit circle. The unit circle is generally something you need to memorize, but if you can remember one quadrant you can just change the signs to apply it to other quadrants. In this case, when sinθ = -1/2, θ is 7π/6, which is equal to 210° (remember that π is equal to 180°)

move it to the other side

step-by-step explanation:

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.