Answer: A block-level element is any element that starts a new line.
ICF is a type of fusion energy research that attempts to initiate a nuclear fusion reaction by heating and compressing a fuel target. Its normally in the form of a pellet that most often contains a mix of deuterium and tritium.
A nuclear reactor is a device used to initiate and control a sustained nuclear reaction. Nuclear reactors are used at nuclear power plants for electricity generation.
Compare: they are both nuclear, they both produce energy, they both are used at power plants.
Contrast: ICF uses fusion, while a nuclear reactor is used to control a sustained nuclear reaction.
This is all I can help with. By the way, are you in rocket science? 'Cause this stuff is hard.
Answer:
Jack has to be very calm and try his best to present himself in an outward way and think about the fact that by the end of the night no one will remember that he messed up, I feel like he'll be okay :)