It is a true hope that helps
<span>More than half of Africa's source of energy comes from coal. Its coal production and waste led to several environmental problems like wildfire and diseases. In one mine leak incident in Africa, last 1953 brought poison on the water supply killed thousands of marine life.</span>
Answer:
Shale.
Explanation:
It is composed of silt or clay that has been compacted or squeezed together to form a solid rock.
The seismic focus is the point in the earth's crust where an earthquake originates from.
