explain how a fossil from a plant or an animal that lived in a warm environment could be found in Antarctica

Plate tectonics

Explanation:

The reason why a fossil of plant from a plant or an animal that once lived in a warm climate can be found in present day cold Antarctica is due to plate tectonics.

Plate tectonics suggests that the earth is broken into series of slabs called lithosphere that moves on top of a weak and ductile asthenosphere.

The present day position of the different plates on earth are not the original position according to the precepts of this theory. Antarctica was further up several millions of years ago. Plate tectonics theory is highly putative and gives more insight into how the earth system works. Antarctica was close to the equatorial region rather than being polar as we know it today. Over the cause of its journey, it has moved relatively to its new position. The jointed land masses before they broke up will have similar fossil records.