According to the existing opinion, volcanic activity on Earth and, probably, on Venus is associated with the release of heat in the planet’s crust due to radioactive decay. Io’s volcanic activity is caused by tidal friction from Jupiter. For this reason, the deformations of the satellite’s surface reach hundreds of meters, while a lot of heat is released. On Triton, the emergence of a powerful geyser occurs as a result of nitrogen breakthrough to the surface, which is under great pressure in the bowels. Vigorously escaping to the surface, the gas carries away ice and particles of rock matter.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.