Question

If two ice cubes are pressed against each other the stick together firmly after some time because

Answer 1

I think so due to cohesive forces they stick together.

Answer 2

If two ice cubes are pressed against each other they stick together firmly after sometime because when the ice cubes are pressed together there is a generation of heat due to which the outer layer melts and the friction decreases as the temperature of both the cubes is less the water refreezes.