Your perspective of space is wrong. Space is permittive of all dynamical movement by all forms of energy and matter. Space is a collection of "fields".
BillyBs said,
a) Space is glass, a transparent solid.
BUT,
By your argument space could be concrete because muons can pass right through concrete. Therefore space is concrete??? Wrong!
Solids only allow movement of subatomic paricles.
OTOH,
https://www.insidescience.org/news/spacetime-may-be-slippery-fluid
b) Space is a transparent fluid. Fluidity allows for movement of both particles and waves.
The viscosity of spacetime restricts velocity of light to SOL or "c".