In december, people in the southern hemisphere

Experience summer and the highest angle of isolation.

just search up "seasonal change due to Earth's tilt date" and see any chart also isolation means the incoming solar radiation. and angle means the highest point in the sky where the sun is closest to your zenith or Polaris if in the northern part.

hope I was help.

The answer is a: the eggs have half as many chromosomes as the body cells

If it doesn't have a nucleus its a prokaryote