The huge power output of the Sun is due to nuclear fusion reactions taking place
within its core. State and explain the conditions necessary for fusion to occur.
The answer must be clear, use an appropriate style and be organised in a
High temperature AND high density/pressure
Any two reasons from:
Overcome coulomb/electrostatic repulsion
Nuclei come close enough to fuse/for strong (nuclear) force to act
High collision rate/collision rate is sufficient