The meaning of some variables

[Bonakva]

What do these lines mean?

fixedWeapon: true
explosionSpeed: 5
attraction: 8

I apologize if I asked a question or created this topic in the wrong place
If there is a topic with general questions, please give a link

[R1dO]

For questions like that it is best to point you to the full reference page: https://www.ufopaedia.org/index.php/Ruleset_Reference_Nightly_(OpenXcom)

If the descriptions there are somehow not clear enough you at least have a starting place to ask for specifics.