Can science explain the unseen?

Yes

Explanation:

For example, we are unable to see the oxygen we breathe and depend on, but through observation and experiments, we are able to confirm its existence and create an explanation for that.

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt

the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.