Answer:
a. Northern hemisphere
b. Neither southern or northern hemisphere
Explanation:
a.The sun is high in the sky in the Northern hemisphere and hence more solar energy reaches the ground than in the Southern Hemisphere. Just the opposite occurs on December 21-22 when the Northern Hemisphere is tilted away from the sun. The sun's vertical rays are directly above 23.5° S.
b.Solstices and shifting solar declinations are a result of Earth's 23.5° axial tilt as it orbits the sun. Throughout the year, this means that either the Northern or Southern Hemisphere is tilted toward the sun and receives the maximum intensity of the sun's rays
