It helps by knowing that subtract does the exact opposite?...
Answer:
Ocean-Ocean Divergent
Continent-Continent Transform
Continent-Continent Convergent
Continent-Ocean Convergent
Ocean-Ocean Transform
Continent-Ocean Convergent
Continent-Continent Divergent
Explanation:
The above all sites are possible to generate earthquake . The divergent boundary whether it is Continent-Continent or Ocean-Ocean can generate shallow earthquake although it's very weak . The transform plate boundary or strike slip plate motion also generate shallow but powerful earthquake ( example: San Andres Fault is a transform plate boundary) . Another one is convergent boundary which can generate deep and very powerful earthquake .
<span>All physical forms of water:solid, liquid, and gas on or near the earth's surface make up the HYDROSPHERE</span>
