The text uses hyperbole, an obvious exaggeration that is not meant to be taken literally.
The hyperbole dinosaurs were still roaming the Earth suggests that Andrew hasn't cleaned his room in a very long time. He did not actually clean his room millions of years ago when dinosaurs existed.
What does the hyperbole in this text suggest?
The last time Andrew cleaned his room, dinosaurs were still roaming the Earth.
A: Andrew hates to clean his room.
B: Andrew hasn't cleaned his room in a very long time.