Geothermal energy sources that can produce steam are located where bodies of magma are relatively close to Earth's surface.
At which regions would these steam-producing energy sources occur?
regions with very hot climates
B regions within stable continents
regions with recent volcanic activity
O regions at latitudes close to the equator

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

i'm pretty sure its b i might be wrong though!

5.6⋅10−^19  j

do you need the explaination?