which type of volcano produces the most explosive eruption?
cinder cone
shield
shatter cone
composite

composite

Explanation:

Composite volcanoes, also referred to as stratovolcanoes, is a type of volcano that has a conical shape and is composed of many hardened layers of lava, tephra, and volcanic ash. It is characterized by a high, steep shape and periodic explosive eruptions.

A characteristic feature of this type of eruption is powerful, often sudden explosions, accompanied by the release of a huge amount of tephra, forming pumice and ash streams. These eruptions are dangerous, as they occur suddenly, often without preliminary warning events.

i don't know why don't you google it?

c it says nothing about connecting those 2 seas.