In any ecosystem, terrestrial or aquatic, what group(s) is (are) always necessary? ; a) autotrophs and heterotrophs; b) producers and primary consumers; c) photosynthesizers; d) autotrophs; e) green plants

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).

a plastic spoon that has a temperature of 78° f is placed into a bowl of soup that has a temperature of 84° f. which of these correctly describes what will happen?

energy as heat moves from the soup to the spoon.