I think the answer is..... C.....
Scientists currently monitor underground movements, such as earthquakes and nuclear tests, using seismometers – instruments that measure the motion of those events at the Earth's surface.
<span>Nitrogen fixation is made by numerous prokaryotes, including bacteria, actinobacteria, and certain types of anaerobic bacteria. Organisms that fix nitrogen are called Diazotrophs.</span>
Plankton exists near the bottom of the ocean's food chain and provides nutrition for whales, shrimp, snail, and jellyfish. Plankton also plays an important role in the carbon cycle by removing inorganic carbon dioxide due to photosynthesis.
A X-rays I think this is the answer