Final answer:
The correct ingredients for nuclear fusion are Energy, Hydrogen Gas, and High Temperatures, as they provide the initial driving force, act as the primary fuel, and overcome the electrostatic repulsion between nuclei respectively.
Step-by-step explanation:
The ingredients needed for nuclear fusion are:
- Energy to start and sustain the fusion process.
- Hydrogen Gas as the primary fuel for standard fusion reactions (such as the fusion of deuterium and tritium).
- High Temperatures to provide the atoms with enough kinetic energy to overcome electrostatic repulsion (Coulomb barrier).
Therefore, the correct options are (a) Energy, (d) Hydrogen Gas, and (c) High Temperatures. Helium Gas is a product of nuclear fusion, not a reactant, and low pressures are not favorable for fusion reactions; high pressures are required to bring the nuclei close enough to overcome the Coulomb barrier.