7. the photograph shows hexagonal basalt columns on a mountain that formed from a volcanic eruption in iceland. which of the following is mostly likely true of the lava that formed these columns?
a. it flowed very quickly.
b. it solidified underground.
c. it cooled very slowly.
d. it was very thick

Ithink d would be correct

Answerhaiti, zambia;

The reason why i feel that the theory of plate tectonics is correct because scientists have found dinosaur bones of the same species in africa, asia, and in the americas. which means that they must have been together at one point in time. plate tectonics is also how the hawaiian islands were formed. as the plate hawaii is on was moving north west, magma would melt through the sea bottom and hardening. forming into the island chain. plate tectonics also explains the mariana trench. two plates were moving away from each other and made a giant crack in the ocean floor running 2,550 kilometers (1,500 miles)  long.

Most topographic maps, the index contour lines are generally darker and are marked with their elevations.