Answer:
D) Monitor volcanic eruptions on Earth
Step-by-step explanation:
Terra means Earth in Latin. It is a flagship program of Earth Observing System (EOS). Satellite Terra was launched in December 1999 and it started gathering data from February 2000. It is sun-synchronous orbit placed about 705 km above the surface of the Earth.
It monitors the Earth through five major instruments. The data includes the surface features as well as of the atmosphere. This also includes monitoring volcanic eruptions.