Answer:
If the earth didn't have a tilt, then we would only have one season which would most likely correspond to spring or autum.
Explanation:
We would also expirience a mini summer when the earth is closest to the sun and we would expeirience a mini winter when the earth is farthest from the sun. Every where on the Earth would have a 12 hour sunlight days. It would still be warm at the equator and cold at the poles.
[I hope this answered your question ᓚᘏᗢ]