Question

temperature is travelling gradually towards the interior of the earth why

Answer 1

Since the moon is gradually receding from the earth, tidal forces are growing weaker. That means that the heat from tidal friction is diminishing, leading to an inevitable cooling. With that mechanism, a glacial advance cannot be far off.

Answer 2

Hii friend,

Due to the extreame pressure , the temperature increases, more you go inside the earth. Due to continuous frictional contact, the energy is released and the temperature increases.

HOPE THIS HELPS YOU :)