Which of the following is metamorphic rocks? i. silica
ii. Diamond
iii. Dolomite
iv. pumice​

diamond is right

Explanation:

When rocks are heated up or put under a lot of pressure, they can change drastically. This is because the minerals that make up the rocks form only at certain temperatures and pressures. Graphite and diamond are two minerals that are both made entirely out of carbon. ...

a≈452.39cm²

explanation:

answer at the divergent plate boundary in the middle of the ocean;