Radiation is the emission of energy as electromagnetic waves or especially high-energy particles which cause ionization. It is not necessary that the source of heat must be a liquid. Most of the time radiation is produced from a solid substance which burns with a high amount of temperature. That temperature is transferred to the surroundings in the form of electromagnetic waves and they do not require any medium to propagate.
She would make use of JavaScript if she wants to make it interactive, CSS if she wants to design it, Text editor obviously for coding the blog and a web browser for the result hope this helps
