<span>I think that it is:
Stay in the south during autumn and winter, and migrate to northern locations in the spring and summer.</span>
At the smallest level of organization, the DNA wraps itself around small globular proteins called histones. Complexes of histones and DNA form nucleosomes, which appear as "beads" on the DNA strand. Chromatin refers to the decondensed DNA that has not formed separate chromosomes.
Both answers C and D are correct, however, answer D makes more sense.
