Question

Distribution of thermal energy across latitudes involves interaction between the hydrosphere and what other sphere

Answer 1

The answer is atmosphere. In atmosphere air is fluid like the hydrosphere and which can then go around with heat energy across great distances (latitudes) Heat can be transferred between air and water easily.  Atmosphere Definition is vertical extension 10,000km (50% mass < 6km; 48% mass < 26km).  Composition of atmosphere are N, O, Ar, variable gases (water vapor, carbon dioxide, ozone.