What does the term "basic unit of matter" refer to?
O A.
Atoms
B.
Elements
Molecules
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It is an atom, atoms are the basic unit of matter, they make up everything, and they are the basic building blocks, yes they indeed also are part of the tornados graystillplays has descend on humanity

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

b. lithosphere, asthenosphere, mesosphere   is the answer most likely