1. will the decompression melting of the asthenosphere take place at hot spot?

2. does the sinking tectonic plates happen in the subduction zone, and also at the convergent boundary?

3. is it more likely to see the volcanoes on the divergent boundaries?

4. if we need to know the boundaries of the active tectonic plates, which map gives more information, the map of active volcanos or the map of earthquake distribution?

5. is trench the converging margin? does oceanic trench marks that the lithospheric plates are subducted?

6. how much of the heat released from inside the Earth comes through the zones represented by plate boundaries?

Thanks in advance!