Question

what would have happened if the axis were not tilted​

Answer 1

Explanation:

When a Mars-size object collided with Earth 4.5 billion years ago, it knocked off a chunk that would become the moon. It also tilted Earth sideways a bit, so that our planet now orbits the sun on a slant. Those were two huge changes. Now, over the course of the year, the amount of sunlight striking the Northern and Southern hemispheres varies as they wobble back and forth — first the Southern Hemisphere leaning sunward, then the Northern. This cycle drives Earth's seasonal variation.