Question

The axis is tilted at an angle of 231/2 degree from the line perpendicular

to the plane of orbit. What would happen if the axis of the earth was
not tilted?
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Answer 1

The sun's rays would always be on the north/south poles, causing progressive unbearable cold for humans and other animals.

Step-by-step explanation:

Earth relies on the sun's rays to keep it warm and balance temperatures. If the earth wasn't tilted, we wouldn't get these sun rays, casing the weather to grow cold. When it becomes cold enough, we humans won't be able to handle it and eventually die off.