Hydrogen. That is how it is continuing to heat, the Hydrogen atoms are fusing to form Hydrogen, but at this point the majority is Hydrogen, eventually it will be majorly Helium, then Carbon.
The greatest weakness is disintegration caused by early rains previously new development can help stay the dirt in more bone-dry atmospheres sandier soils. The better points of interest are advanced soil supplements as a side-effect of the consumer and evacuating high centralization of harming plants in the Ecosystem.
Question 2's answer would be
Black soil that contains a lot of water.
Question 3's answer i believe would be soil surveys
Hope this helped!