Question

what lead to the cycle of seasons​

Answer 1

Answer:

Because the sun is our source of light, energy and heat, the changing intensity and concentration of its rays give rise to the seasons of winter, spring, summer and fall. The seasons are marked by solstices and equinoxes — astronomical terms that relate to Earth's tilt.

Answer 2

Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.