Satellite terra is able TO MONITOR VOLCANIC ERUPTIONS ON EARTH. <span>Satellite terra is a scientific research satellite that was released into space on December 18th, 1999. The satellite possesses five remote sensors, which are specially designed to monitor the earth's environment and its climate changes. Data collection from the satellite started on February 24, 2000. The data that are obtained from the satellites help scientists to really understand the global environmental changes that are currently affecting our planet.</span>
The correct answer is C. <span>The keystone species is critical to maintaining the stability of an ecosystem, and changes in its population indicate changes in ecosystem health. </span>
