Final answer:
In summer, the Sun is high in the sky and its rays hit Earth directly, making the days longer. In winter, the Sun is low in the sky and its rays spread out over a wider area, making the days shorter.
Step-by-step explanation:
In summer, the Sun appears high in the sky and its rays hit Earth more directly, spreading out less. This results in the Sun's path being longer in summer and the days being longer.
On the other hand, in winter, the Sun is low in the sky and its rays spread out over a wider area, becoming less effective at heating the ground. This causes the Sun's path to be shorter in winter and the days to be shorter.