Because of their intense heat, lava flows are great fire hazards. Lava flows destroy everything in their path, but most move slo
wly enough that people can move out of the way. What is the main idea of this paragraph from the "Volcanoes" page of the Ready.gov website?
A. The danger of lava flows
B. How to avoid lava flows
C. Where lava flows are found
D. The cause of lava flows
