The correct answer is C. Spring.
Step-by-step explanation
The seasons of the year originated from the different positions that the earth has concerning the sun. These positions are often associated with the solstices and equinoxes. During each year there are two solstice periods, one in June and one in December, and two periods of the equinox, one in March and one in September. The image illustrates the stage of the September equinox in which the sun's rays strike more directly in the southern hemisphere than in the northern hemisphere, causing the autumn season in the north and the spring season in the south. Therefore, the correct answer is C. Spring.