The formation of an atoll is a slow process that can take millions of years. It begins when an underwater volcano erupts, creating a buildup of lava on the seafloor. With continued eruptions, the lava continues to build until it breaks through the ocean's surface and forms an island.
Answer:
evenly spaced line and purple triangles with alternative shape ,in the direction of the front movemenmovemens with semi circles
Explanation:
to protect domestic industry or to “punish” a trading partner.
Distance to the epicenter of an earthquake