Fractional Crystallization
The asthenosphere and the lithosphere are parts of the Earth's geosphere. The correct answer is A.
NON CONVENTIONAL =
Energy generated by using wind, tides, solar geothermal heat and biomass including farm and animal waste as well as human excreta is known as non-conventional energy. All these sources are renewable or inexhaustible and do not cause environment pollution. More over they do not require heavy expenditure.
CONVENTIONAL=
Conventional energy means the energy source which is obtained from fixed reserves in nature like oil, gas and coal. In other words conventional energy is also termed as non-renewable energy sources, or fossil fuels.
Non-vascular plants lack a true vascular (organised tranport) system for water and sugars. i.e. they lack xylem and phloem vessels
