"The weight of the ground above the rift had been pressing down on the New Madrid fault, holding back the stored-up stress for millions of years. As the river washed away the ground, a huge weight was lifted from Earth's crust." What do Freed and his colleagues think happened as that pressure eased?

Fred and his colleagues believe that as the pressure eased, the failures also decreased and stimulated the various earthquakes that are likely to be noticed in New Madrid.

Explanation:

After researching the origin of the failure in New Madrid and the consequences this causes, Fred and his research colleagues came to the conclusion that the weight of the soil above the speech retained the stress that this situation caused in the region. However, the river that passed through this place began to remove the elements above the ground causing a progressive decrease in weight, which generated a decrease in pressure, which consequently reduced the failures of the place and caused the numerous earthquakes that occur in the place. However, Fred confesses that it is difficult to obtain evidence to prove this.

nobody can answer this if you dont show us the shapes

i think the answer your looking for is

enforced