What caused the ring of fire?

a. movement and collisions of crystal plates

b. the lack of dormant volcanoes in the region

c. the motion of fault lines causing numerous small earthquakes

d. a series of trenches and arcs

[fw.02]sinkholes are often formed as a result of the actions of. a. heat on recharge b. pressure on aquifers c. acid in groundwater d. minerals in hot springs

Why is immigration so important today?

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed