<span>Sinkholes, especially like the one that occurred in Mexico City, are often sign that the water reservoir is being depleted. Usually, the water underneath the ground helps stabilize it, however if there is suddenly open space or a cavern, it can collapse on its self causing a sink hole. This could also happen from fracking and drilling.</span>
Your answer is D.Viracocha
Answer:
The reactor generated the first electricity from nuclear energy on December 20, 1951. Enrico Fermi led a group of scientists in initiating the first self- sustaining nuclear chain reaction. The historic event, which occurred on December 2, 1942, in Chicago.
Answer: A
Explanation:
roman empire founded - 27 bce
olmec founded - 1200 bce
egyptian empire collapse - 310 bce
maya collapse - 900 ad
