Answer:
Option A, first, Sun and core of Earth
Step-by-step explanation:
According to first law of thermodynamics,
An energy can never be created nor destroyed, it can only be converted from one form to other and therefore the first law of thermodynamics is known as law of conservation of energy.
There are only few energy sources for planet earth – Solar energy, gravity, rotation of earth and radioactive energy
Solar energy is the prominent source of energy that drives several natural process like winds, hydrologic cycle, biosphere ecological cycle , and also derives the overall climate system . While the earth core causes gravitational force which is very essential for several natural process like rotation, tides, etc.