Question

The teacher said the earth is spherical

Answer 1

Heya,

Answer to your question is:-

The teacher told that the Earth is spherical.

-» There will be no change in the object since it is a universal truth and when we change the speech of the sentence the universal truth remains the same.

HOPE THIS HELPS YOU:-))
@Ashu

Answer 2

Answer = The teacher told that the earth is spherical.

There is no change in the sentence said by teacher because "Earth is spherical" is universal truth.

Hope it helps you!
please mark my answer as brainiest.